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Paste anything, share with one link · HTML · Markdown · Short link sharing · Images · Audio & video · Files
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Text in D1, files on S3. Deleted after 10 views or 24 hours. No account. Open the full clipboard page
Tools
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AI
- Remove backgroundAI cut-out for people, products and pets. Transparent PNG. Runs in your browser.
- AI image upscalerEnlarge photos and anime art 2× or 4× with AI. Nothing is uploaded.
- Speech to textTranscribe audio and video with Whisper. TXT, SRT and VTT. Nothing is uploaded.
- Depth map generatorTurn a photo into an AI depth map for 3D, parallax and ControlNet.
Images
- ID Watermark & RedactTile a for-use-only mark on ID copies, add an invisible watermark, and box out numbers. Nothing is uploaded.
- Photo mosaic & redactPixelate or black out ID numbers, faces, and plates. Nothing is uploaded.
- Photo collagePhoto collage maker with grids and Instagram sizes. Nothing is uploaded.
- Portrait camera simLearn aperture, shutter and lenses on photoreal and anime adults. Export in this tab.
- Resize imageResize image or compress JPG and WebP. Nothing is uploaded.
- Crop imageCrop photos. Square, 4:5, 16:9. Nothing is uploaded.
- Rotate imageRotate or flip a photo. Download JPG or PNG. Nothing is uploaded.
- EXIF removerStrip EXIF and GPS. Download a clean photo. Nothing is uploaded.
- Meme generatorTop and bottom captions on a photo. Download PNG. Nothing is uploaded.
- Signature generatorDraw a signature, download PNG. Nothing is uploaded. Not a legal e-sign.
- Favicon generatorPhoto to ICO and PNG. Nothing is uploaded.
- Screenshot editorBoxes, arrows, labels on a photo. Download PNG. Nothing is uploaded.
- Image color paletteMain colors of a photo as HEX. No upload.
Convert
- HEIC to JPGHEIC to JPG, WebP to PNG, JPG ↔ PNG, SVG, ICO. Optional resize. No upload.
- JPG to PDFJPG to PDF and PNG to PDF. Several photos, one file. Nothing is uploaded.
- PDF to JPGPDF pages to JPG, PNG, or WebP. ZIP for many pages. Nothing is uploaded.
- Merge PDFCombine PDFs in this tab. Reorder, then download one file.
- Compress PDFPDF compressor. Re-encode pages as JPEG. Smaller file, on-device.
- Split PDFOne PDF per page, or extract 1–3,5. On-device.
- Invoice generatorFill line items, tax, and currency. Download a PDF. Nothing is uploaded.
- Audio to WAVMP3 to WAV, plus M4A and OGG. Choose sample rate. Runs in the browser.
- Audio cutterTrim a clip. Download WAV. Nothing is uploaded.
- Audio joinerJoin clips into one WAV. Nothing is uploaded.
- Text & dataJSON formatter, CSV ↔ JSON, Base64, Markdown. Nothing is uploaded.
- XML to JSONXML ↔ JSON in this tab. Nothing is uploaded.
- YAML to JSONYAML ↔ JSON in this tab. Nothing is uploaded.
- JSON formatterPretty-print or minify. Nothing is uploaded.
- Base64Encode or decode UTF-8. Nothing is uploaded.
Text
- Password generatorStrong random passwords on your device. Choose length and symbols.
- Word counterWords, characters, sentences, reading time. Nothing is uploaded.
- Color pickerHex, RGB, HSL, contrast, eyedropper. Nothing is uploaded.
- Hex to RGBHEX, RGB, HSL, CMYK. Copy values. Nothing is uploaded.
- Name generatorRandom names and usernames. Copy a list. Nothing is uploaded.
- Timezone converterConvert a clock time between IANA zones. DST and UTC offset. Nothing is uploaded.
- Timestamp converterUnix time to date. Seconds, milliseconds, ISO. Nothing is uploaded.
- Lorem ipsumClassic placeholder paragraphs, sentences, or words. Copy in this tab.
- Unit convertercm to inches, kg to lbs, °C to °F. Length, mass, volume, area, speed. On-device.
- Text to speechHear text with device voices. Rate and pitch. Nothing is uploaded.
- Diff checkerCompare two texts. Added and removed lines. Nothing is uploaded.
- UUID generatorRandom v4 UUIDs. Copy a list. Nothing is uploaded.
- Hash generatorMD5, SHA-256, SHA-1. Hash text or a file. Nothing is uploaded.
- Regex testerTest a pattern. See matches. Nothing is uploaded.
- Case converterUpper, lower, title, camel, snake. Nothing is uploaded.
- JWT decoderRead header and payload. Not a signature check. Nothing is uploaded.
- Percentage calculatorWhat percent, percent of, increase. Nothing is uploaded.
- Random numberRandom integers with Web Crypto. Nothing is uploaded.
- HTML encodeEncode or decode entities. Nothing is uploaded.
- Cron explainerRead a crontab line. Nothing is uploaded.
- Slug generatorTitle to URL slug. Nothing is uploaded.
- Age calculatorYears, months, days from a birth date. Nothing is uploaded.
- BMI calculatorBMI from kg and cm. WHO bands. Nothing is uploaded.
- Binary converterText ↔ binary (UTF-8). Nothing is uploaded.
- Tip calculatorTip and split a bill. Nothing is uploaded.
- Morse codeText ↔ Morse. Nothing is uploaded.
- Roman numerals1–3999 ↔ Roman. Nothing is uploaded.
- Discount calculatorSale price after a percent off. Nothing is uploaded.
- CountdownHours, minutes, seconds. Nothing is uploaded.
- Loan calculatorMonthly payment from principal, rate, years. Nothing is uploaded.
- StopwatchElapsed time. Nothing is uploaded.
- Compound interestFuture value from principal, rate, years. Nothing is uploaded.
- VAT calculatorAdd tax or split a gross price. Nothing is uploaded.
- Reverse textBackwards text and palindrome check. Nothing is uploaded.
- URL encodePercent-encode or decode. Nothing is uploaded.
- Text to hexUTF-8 hex. Nothing is uploaded.
- Days between datesCalendar day count. Nothing is uploaded.
- Sort linesA→Z, Z→A, or unique. Nothing is uploaded.
- Find and replaceLiteral find and replace. Nothing is uploaded.
- Number to wordsUS English words. Nothing is uploaded.
- Add days to a dateAdd or subtract whole days. Nothing is uploaded.
- Week numberISO week for a date. Nothing is uploaded.
- Aspect ratioSimplify 1920×1080 to 16:9. Nothing is uploaded.
- Business daysWeekdays between two dates. Nothing is uploaded.
- Fraction calculatorSimplify or convert a decimal. Nothing is uploaded.
- Hourly to yearlyGross pay from hours and weeks. Nothing is uploaded.
- Profit marginMargin and markup from cost and price. Nothing is uploaded.
- Base converterBinary, decimal, and hex. Nothing is uploaded.
- Time durationAdd or subtract hours and minutes. Nothing is uploaded.
- TDEE calculatorBMR and daily calories. Nothing is uploaded.
- Subnet calculatorIPv4 CIDR, mask and host range. Nothing is uploaded.
- Chmod calculatorOctal ↔ rwx permissions. Nothing is uploaded.
- Typing speed testWPM and accuracy in 30 or 60 seconds.
- Dice rollerRoll dice or flip a coin. Nothing is uploaded.
- GPA calculatorLetter grades and credits to a 4.0 GPA. Nothing is uploaded.
- Pomodoro timer25-minute focus and breaks with a chime. Nothing is uploaded.
- Sleep calculatorBedtime or wake-up time by 90-minute cycles. Nothing is uploaded.
- Body fat calculatorU.S. Navy tape method, metric or imperial. Nothing is uploaded.
- Contrast checkerWCAG AA / AAA ratio for two colors. Nothing is uploaded.
- Pace calculatorPace, time or distance, with race predictions. Nothing is uploaded.
- Final grade calculatorThe final exam score you need. Nothing is uploaded.
- Due date calculatorDue date and weeks pregnant from the last period. Nothing is uploaded.
- Ideal weight calculatorFour formulas and the healthy BMI range. Nothing is uploaded.
- Water intake calculatorDaily water from weight, exercise and climate. Nothing is uploaded.
- Fuel cost calculatorTrip fuel and cost, round trip, split by people. Nothing is uploaded.
- Reading time calculatorMinutes to read or speak a text. Nothing is uploaded.
- Time card calculatorWeekly hours, breaks, overtime and pay. Nothing is uploaded.
- Electricity cost calculatorWhat an appliance costs to run. Nothing is uploaded.
- Ovulation calculatorFertile window and next period. Nothing is uploaded.
- Macro calculatorProtein, fat and carbs in grams. Nothing is uploaded.
- Calories burned calculatorCalories for 16 activities by weight and time. Nothing is uploaded.
Assets
- Gold weightTroy ounce, gram, and tael. Nothing is uploaded.
- Silver weightTroy ounce, gram, and tael. Nothing is uploaded.
- Platinum weightTroy ounce, gram, and tael. Nothing is uploaded.
- Palladium weightTroy ounce, gram, and tael. Nothing is uploaded.
- Oil volumeBarrel, US gallon, and liter. Nothing is uploaded.
- Stock arithmeticMarket cap, P/E, and dividend yield. Nothing is uploaded.
Device
- What is my IP addressThe public address of this request, after you ask.
- What browser am I usingName and version reported by this tab.
- What is my screen resolutionScreen size and window size in CSS pixels.
- What is my user agentThe raw string this browser sends.
- What language is my browserThe language list this tab reports.
- What is my time zoneThe IANA zone and the current UTC offset.
- Is dark mode onThe color scheme and motion preference this tab reports.
Tests
- 16 personality types test (MBTI-style)Get your four-letter type and how strongly you lean on each pair. 32 questions.
- Big Five personality testThe public-domain IPIP 50: openness, conscientiousness, extraversion, agreeableness, neuroticism.
- Introvert or extrovert testIntrovert, ambivert or extrovert, from 20 public-domain IPIP items.
- Enneagram testFind which of the nine types drives you, with scores for all nine.
- Love language testWords, time, gifts, service or touch: how you most like to receive love.
- Attachment style testSecure, anxious, avoidant or fearful-avoidant in close relationships.
- Marriage readiness testCommunication, conflict, money, family and the future, scored area by area.
- Conflict style testCompeting, collaborating, compromising, avoiding or accommodating, with when each helps.
- Career interest test (Holland code)Rate 36 activities for your RIASEC code and careers that fit it.
- Work style testRemote, hybrid or office; solo or team; structure and variety, with tips for each.
- Money personality testSaver, spender, investor, avoider or giver, with one tip for your type.
- Which Pokémon type are you?Fire, Water, Electric or Ghost? 12 questions and a partner Pokémon to match.
- Which Genshin Impact Vision would you get?Anemo, Geo, Electro, Dendro, Hydro, Pyro or Cryo, with characters who share it.
- Which Sonic character are you?Sonic, Tails, Knuckles, Amy, Shadow, Rouge, Cream or Silver, from 12 questions.
- Which D&D class are you?All 12 Dungeons & Dragons classes, from barbarian to wizard, in 14 questions.
- Which Naruto character are you?Naruto, Sasuke, Sakura, Kakashi, Hinata, Itachi and more, from 12 questions.
- Which Demon Slayer breathing style are you?Water, Flame, Thunder, Beast, Insect, Mist, Love and more, with the slayer who uses it.
- Which Jujutsu Kaisen character are you?Yuji, Megumi, Nobara, Gojo, Nanami, Maki, Toge or Todo, from 12 questions.
- Which Avatar element are you?Water, Earth, Fire or Air: which element would you bend? 12 questions.
- Anime character archetype quizTsundere, kuudere, genki or chuunibyou? 12 questions, just for fun.
- Chronotype test: morning lark or night owl?14 questions about your natural rhythm, with sleep and schedule tips.
- Which pet suits you?Cat, dog, rabbit, fish, bird, hamster or reptile, matched to your time, space and budget.
- Face shape testSix mirror questions to find your face shape, with hair and glasses tips.
- Self-esteem test (Rosenberg)The 10-item Rosenberg scale, scored out of 30.
- Anxiety test (GAD-7)The 7-question anxiety screening doctors use, scored 0 to 21.
- Depression test (PHQ-9)The 9-question depression screening, scored 0 to 27.
Data
- World population by countryPopulation of 217 countries, ranked, with share of the world.
- GDP by countryNominal GDP in US dollars for every economy, ranked.
- GDP per capita by countryAverage output per person, richest to poorest.
- Life expectancy by countryYears a newborn can expect to live, by country.
- Fertility rate by countryBirths per woman, from highest to lowest.
- Internet users by countryShare of each country's people who go online.
- ISO country codesAlpha-2, alpha-3 and numeric codes for 249 countries.
- International calling codesThe +code to dial for every country.
- ISO currency codesISO 4217 codes, symbols and where each currency is used.
- Time zones and UTC offsetsEvery IANA time zone with its winter and summer offset.
- Paper sizesA4, A3, B5, Letter and more in mm, inches and pixels.
- ASCII tableAll 128 codes in decimal, hex, octal and binary.
Lessons
- How to make a QR codePut a URL in, download a PNG, scan it with a phone before you print.
- How to make a barcodeChoose Code 128, 39, or EAN-13, download a PNG, scan with the reader you will use.
- How to merge PDF filesDrop PDFs in order, download one file, reopen it and count the pages.
- How to compress a PDFMatch the email or form limit, recompress pages, then open a photo-heavy page.
- How to split a PDFEvery page as a file, or just pages 1–3. Download, then count.
- How to convert HEIC to JPGiPhone photos are often HEIC. Export JPG in Safari or Chrome, then open the JPG on the PC you will send it to.
- How to convert JPG to PDFDrop photos in order, pick A4 or fit-to-photo, download one PDF, flip every page.
- How to convert PDF to JPGEach page becomes an image. Choose 1× or 2×, download, open one file at 100%.
- How to convert WebP to PNGChrome often saves WebP. Export PNG, then open it in the app that rejected WebP.
- How to convert PNG to JPGPick JPG for a smaller photo. Check that a clear background became a solid matte, then compare file size.
- How to convert JPG to PNGPick PNG for lossless edits or a form that wants PNG. It will not punch a hole in the background. The file usually gets larger.
- How to convert AVIF to JPGChrome often saves AVIF. Export JPG, then open it on the PC or form that rejected AVIF.
- How to convert PNG to WebPPick WebP for a smaller file that can keep a clear background. Then open it in a browser, not in an old form.
- How to make an invoice PDFFill from/to, add line items, check tax and total, download a PDF, then read the numbers once. Not a tax form.
- How to crop a photoPick 1:1, 4:5, or 16:9 first, move the box, check the four edges, reopen at 100%.
- How to rotate or flip a photoTurn 90° or 180°, or flip a mirror. Download, then open the file — not only the preview.
- How to resize or compress an imageSet a real pixel cap or file-size cap, then open the download at 100%.
- How to add a watermark to a photoStamp a shop name or logo, set opacity, download, then check at 100%.
- How to watermark an ID copy before sending itWrite who it is for, tile it with the date, black out what they do not need.
- How to pixelate part of a photoBlack out numbers, pixelate faces, check at 100%, then share.
- How to remove EXIF / location from a photoPhones store GPS in the file. Export a clean copy, then drop the export to prove it is gone.
- How to make a photo collagePick a grid, drop photos, choose contain vs cover, download, then check faces.
- How to make a memeDrop a photo, type top and bottom text, download a PNG, then check it at phone width.
- How to make a faviconCrop to a square, pick Cover or Contain, download ICO plus PNG sizes, then check the 16-pixel version.
- How to draw a signature PNGDraw on the pad, download a cropped PNG, then check it at the size of the form. Not a legal e-sign.
- How to annotate a screenshotDrop a screenshot, add a box, an arrow, or a label, download a PNG, then check it at the size you will send.
- How to trim audio / cut an MP3Set start and end, listen, download WAV, then play the file before you send it.
- How to convert MP3 to WAVDrop the MP3, pick a sample rate if you need one, download WAV, then play the file. The original stays on disk.
- How to join audio files / merge MP3sDrop two or more clips in order, download one WAV, then play the file from start to end.
- How to count words and charactersPaste the text, read the matching number, trim if a form has a cap.
- How to generate a strong passwordSet length and character types, copy once, paste into the account, then close the tab. Do not email it.
- How to format JSONPretty-print with two spaces or minify to one line, then copy the output. Comments and trailing commas are not JSON.
- How to decode Base64Decode standard Base64 to UTF-8 text, or encode text the other way. Minus and underscore are refused. A picture is not text.
- How to convert a Unix timestampCount the digits, paste seconds or milliseconds, then read ISO and local time. Do not convert the number twice.
- How to read a JWTPaste a token, read the header and payload, and look at exp. The signature stays unchecked. A decoded token is only JSON you can see.
- How to count business daysCount Monday through Friday between two dates, including both ends. A Wednesday holiday stays in the count.
- How to simplify a fractionReduce a whole numerator and denominator, or turn a decimal into a fraction. 4/6 becomes 2/3. A decimal stops at denominator 10,000.
- How to convert hourly pay to a yearly salaryMultiply one hourly rate by hours per week and weeks per year. The default is 40 by 52, which is 2,080 hours. The result is gross pay.
- How to convert a time zonePick the zone that owns the clock you were given, then the other zone. Daylight saving follows the date. Copy is the UTC instant.
- How to calculate a profit marginDivide profit by the selling price for margin, and by the cost for markup. Cost 50 and price 80 is a 37.50% margin and a 60.00% markup.
- How to convert a number between basesConvert one whole number between bases 2 and 36. 255 in base 10 is FF in base 16. No 0x prefix and no fraction.
- How to add hours and minutesAdd or subtract two lengths written as hours:minutes:seconds. Minutes and seconds must be 0–59. 0:90:00 is not a valid length.
- How to calculate a percentageRead four lines from the same two numbers. 25% of 200 is 50. 25 is 12.5% of 200. 200 plus 25% is 250.
- How to count days between two datesThe signed difference does not include both ends. Monday 5 January 2026 to Friday 9 January is 4 days. The same span is 5 business days on the other page.
- How to add days to a dateAdd a whole number of calendar days. 28 February 2024 plus 1 is 29 February 2024. A fraction of a day fails. Friday plus 1 is Saturday.
- How to find the ISO week numberISO weeks start on Monday. Week 1 contains the year's first Thursday. 1 January 2021 is Friday of 2020-W53.
- How to add VAT to a priceExclusive adds the tax. 100 at 20% becomes 120.00. Inclusive splits a gross price. 120 at 20% is 100.00 net and 20.00 tax, not 24.00.
- How to calculate a discount20% off 100 is a sale price of 80.00 and a saving of 20.00. That is not a 20% profit margin. 120% off can go below zero.
- How to encode a URLEncoding turns a space into %20 and also encodes slashes. Decoding turns + into a space. A broken % sequence fails.
- How to calculate ageCount civil years, months, and days. Born 15 March 2000, on 14 March 2026 the age is still 25 years, 11 months, and 27 days.
- How to find an aspect ratioReduce whole pixels. 1920 by 1080 is 16:9. 1080 by 1920 is 9:16. Decimals are rounded before the ratio. This does not crop a photo.
- How to calculate BMI70 kg and 170 cm is a BMI of 24.2, in the Normal band. 1.70 in the centimetre box is 242214.5. 25 is Overweight and 30 is Obesity.
- How to split a tip100 at 20% for 4 people is a tip of 20.00, a total of 120.00, and 30.00 each. Each person splits the whole bill. 2.9 people counts as 2.
- How to calculate a loan payment10000 at 12% for one year is a monthly payment of 888.49. The interest is 661.85, not 1200. 12000 at 0% for one year is 1000.00 a month.
- How to read a cron expressionThis page reads five fields: minute, hour, day of month, month, and weekday. 0 9 * * 1 is 09:00 on Monday. Sunday is both 0 and 7. MON and a sixth field fail.
- How to find the best bedtimeCount back from your alarm in 90-minute cycles plus 14 minutes to fall asleep. A 07:00 alarm means bed at 23:16 for five cycles or 21:46 for six.
- How to measure body fat with a tapeMeasure neck, waist and hips, enter them with your height, and read the U.S. Navy body fat percentage and its category. Add weight to see fat and lean mass.
- How to check color contrast for WCAGEnter the text and background hex colors and read the ratio. Normal text needs 4.5:1 for AA and 7:1 for AAA; large text needs 3:1 and 4.5:1. A passing color is suggested.
- How to calculate running paceEnter distance and time to get pace per km and per mile, or enter pace to get a finish time. 10 km in 55:00 is 5:30 /km, 8:51 /mi, and a 3:52:04 marathon at the same pace.
- How to calculate the grade you need on a finalEnter your current grade, the grade you want and the final's weight. 85% now, 90% wanted and a 30% final needs 101.7%, so aim for a B instead. Needed = (wanted − current × (1 − weight)) ÷ weight.
- How to calculate TDEE and daily caloriesEnter sex, age, weight, height and activity. BMR comes from Mifflin–St Jeor and TDEE is BMR times an activity factor. A 30-year-old man, 70 kg, 175 cm, moderate activity: 1649 and 2556 kcal.
- How to calculate GPA on the 4.0 scaleEnter a letter grade and credits per course. Each grade becomes points (A 4.0, B+ 3.3, B 3.0), points times credits are added and divided by total credits. A 3, B+ 3, A- 4, B 3 gives 3.51.
- How to use a Pomodoro timerStart a 25-minute focus block, rest 5 minutes at the chime, and take a 15-minute break after four rounds. The tab title shows the time left; the chime needs the tab open.
- How to calculate a due dateEnter the first day of the last period and the cycle length. Due date = last period + 280 days, shifted by cycle − 28. A period starting 1 January gives 8 October; a 32-day cycle gives 12 October.
- How to find your ideal weightEnter sex and height to read the Devine, Robinson, Miller and Hamwi ideal weights and the BMI 18.5–24.9 range. A 170 cm man: 65.9 kg Devine, 65.2 kg Robinson, 66 kg Miller, 66.7 kg Hamwi, BMI range 53.5–72 kg.
- How to work out how much water to drink a day35 ml per kg of body weight, plus 12 ml per minute of exercise, plus 500 ml in hot weather. 70 kg with 30 minutes of exercise gives about 2.8 litres, 12 glasses of 250 ml.
- How to calculate the fuel cost of a tripDistance × economy gives litres, litres × price gives cost. 300 km at 7 L/100 km uses 21 litres; at 1.60 a litre that is 33.60, or 67.20 for the round trip, 22.40 each for three people.
- How to estimate reading time for a textPaste the text. Words ÷ 238 gives silent reading minutes, words ÷ 130 gives speaking minutes. 650 words is a five-minute talk; 1200 words is a five-minute read. Chinese, Japanese and Korean are counted in characters.
- How to compare two texts and see the differencesPaste the original on the left and the new version on the right. Added lines show green, removed lines red, and the counts sit above. Tick Ignore extra spaces to skip whitespace changes; copy a unified diff for a ticket.
- How to get the MD5 or SHA-256 hash of text or a filePick MD5, SHA-1, SHA-256, SHA-384 or SHA-512, paste text or choose a file, and copy the hex or Base64 digest. Compare it with the checksum a download page lists; one different character means a different file.
- How to generate a UUIDSet how many, choose hyphens and case, press Generate and copy the list. Each UUID is version 4, 122 random bits from Web Crypto, such as 3f2504e0-4f89-41d3-9a0c-0305e82c3301.
- How to calculate hours worked on a time cardEnter start, end and unpaid break for each shift. 09:00–17:30 with 30 minutes off is 8 hours, five days is 40, and a Saturday 09:00–14:00 adds 5 hours of overtime: 950.00 at 20 an hour with 1.5× overtime.
- How to calculate the electricity cost of an applianceWatts × hours ÷ 1000 = kWh; kWh × your price = cost. A 1000 W air conditioner for 8 hours a day for 30 days uses 240 kWh: 36.00 at 0.15 a kWh, 438.00 a year.
- How to find your fertile window and ovulation dayOvulation is about 14 days before the next period. A period starting 1 January with a 28-day cycle gives ovulation on 15 January, a fertile window of 10–15 January and the next period on 29 January.
- How to calculate your macros in gramsSplit a calorie target into protein, fat and carbs. Grams = calories × share ÷ 4 for protein and carbs, ÷ 9 for fat. 2500 kcal at 30/30/40 is 188 g protein, 83 g fat and 250 g carbs.
- How to calculate calories burned during exerciseCalories = MET × body weight in kg × hours. 30 minutes at 70 kg: running at 10 km/h about 343 kcal, jumping rope 413, cycling 280, swimming 203, yoga 88.
- How to calculate compound interestFuture value = principal × (1 + rate ÷ n)^(n × years). 1000 at 5% for 10 years grows to 1628.89 compounded yearly, 1647.01 monthly and 1648.66 daily.
- How to remove the background from a photo for freeDrop JPG, PNG, WebP or HEIC photos and an AI model cuts out the subject in your browser. Pick transparent, white, a color or blur, then download PNG, WebP or JPG, or all at once as a ZIP.
- How to test a regular expressionType a pattern, set the g, i, m, s and u flags and paste text to see every match with its capture groups. A replacement such as [$&] or $1 previews the result before you use it in code.
Knowledge
- What is HEIC?iPhone photo format, how it differs from JPG, and when to convert.
- JPG vs PNG vs WebP vs AVIFWhich image format to use for photos, screenshots and the web.
- What is EXIF data?Camera, time and GPS details hidden in photos, and how to remove them.
- DPI vs PPIPixels, print size and why 300 DPI only matters on paper.
- Aspect ratios explained16:9, 4:3, 1:1, 9:16 and the pixel sizes that go with them.
- Why are PDF files so large?Images, fonts and scans that bloat a PDF, and what compression changes.
- What is Base64?How Base64 turns bytes into text, why it grows 33%, and why it is not encryption.
- Unicode and UTF-8Code points, bytes, and why text turns into garbled characters.
- URL encoding (percent-encoding)Why spaces become %20 and which characters must be escaped.
- JSON vs YAML vs XMLSyntax, strengths and pitfalls of the three data formats.
- MD5 vs SHA-256What a hash is, which ones are broken, and what to use for passwords.
- What makes a password strong?Length, randomness and entropy, following current NIST guidance.
- What is a UUID?UUID versions 4 and 7, collision odds and when to use each.
- What is a Unix timestamp?Seconds since 1970, milliseconds in JavaScript and the 2038 problem.
- ISO 8601 dates and week numbersYYYY-MM-DD, week 1, durations and the RFC 3339 profile.
- UTC, GMT and time zonesOffsets, daylight saving time and why zone names beat offsets.
- APR vs APYSimple vs compounded rates, the formula and a worked example.
- Margin vs markupTwo ways to state profit, how to convert them and a quick table.
Games
- Super Mario BrosNES platformer. Cheats, a short walkthrough, play in this tab.
- ContraNES run-and-gun. 30 lives, spread gun, cheats, play in the browser.
- Battle CityFC tank game. Stage select, extra lives, play in the browser.
- Adventure IslandFC platformer with skateboard and fruit. Cheats and walkthrough.
- Tetris (NES)NES Tetris. Level cheats, next-piece, play in the browser.
- Double DragonNES beat-em-up. Lives, energy, weapon cheats, walkthrough.
- Super Mario WorldSNES platformer. Lives, Yoshi, cape cheats, walkthrough.
- The Legend of Zelda: A Link to the PastSNES Zelda. Rupees, hearts, sword cheats, walkthrough.