Whichly

An index of fifty-six tools that run inside this tab.

Whichly is a reference shelf of small programs — for PDFs, images, video and audio, text, code, everyday sums and school geometry. Each one is a page your browser downloads once and then runs on your own machine: you pick a file, the work happens in memory, and the result is saved straight back to your disk.

There is no upload step because there is no server to upload to. That is also why the index below is the whole product — every line is a page you can open now, and the two workbenches at the end are only the ones large enough to need chapters of their own.

I Image tools 7 tools · 01–07
  1. 01 Image to Text (OCR) image-to-text Extract text from a photo or screenshot — on your device.
  2. 02 Resize Image resize-image Change an image's width and height — in your browser, nothing uploaded.
  3. 03 Crop Image crop-image Cut a region out of an image — drag a box or type exact pixels, nothing uploaded.
  4. 04 Rotate Image rotate-image Rotate or flip an image — in your browser, nothing uploaded.
  5. 05 Favicon Generator favicon-generator One image in, the whole favicon set out — .ico, PNGs and the <head> tags.
  6. 06 Watermark Image watermark-image Add a text watermark to a photo — in your browser, nothing uploaded.
  7. 07 Image Color Picker image-color-picker Pick a colour from a photo and get its hex — in your browser, nothing uploaded.
II PDF tools 11 tools · 08–18
  1. 08 Edit PDF pdf-editor See every page. Turn, delete, reorder, add — then download once.
  2. 09 Merge PDF merge-pdf Combine PDFs into one — in your browser, nothing uploaded.
  3. 10 Split PDF split-pdf Extract pages, or split into one file per page.
  4. 11 Rotate PDF rotate-pdf Turn sideways pages the right way up — and save it.
  5. 12 Images to PDF jpg-to-pdf Photos or scans into one PDF, in the order you pick.
  6. 13 PDF to JPG pdf-to-jpg Turn each page of a PDF into a JPG image — in your browser, nothing uploaded.
  7. 14 PDF to PNG pdf-to-png Turn each page of a PDF into a lossless PNG image — in your browser, nothing uploaded.
  8. 15 PDF to Text pdf-to-text Extract the text from a PDF — instantly, in your browser, nothing uploaded.
  9. 16 Delete PDF Pages delete-pdf-pages Remove pages from a PDF — name the ones to drop, keep the rest.
  10. 17 Watermark PDF watermark-pdf Stamp a text watermark across every page — in your browser, nothing uploaded.
  11. 18 Add Page Numbers to PDF page-numbers-pdf Number the pages of a PDF — "1", "1 / 12" or "Page 1 of 12".
III Video & audio 7 tools · 19–25
  1. 19 Trim Video trim-video Cut a clip out of a video — instantly, in your browser, nothing uploaded.
  2. 20 Trim Audio trim-audio Cut or shorten an MP3 — lossless and on-device, nothing uploaded.
  3. 21 Video to MP3 video-to-mp3 Extract the audio from a video as an MP3 — in your browser, nothing uploaded.
  4. 22 Video to GIF video-to-gif Turn a clip of a video into an animated GIF — in your browser, nothing uploaded.
  5. 23 Remove Audio from Video remove-audio Mute a video — strip the sound, keep the picture, instantly and losslessly.
  6. 24 Audio Converter audio-converter Convert audio between MP3, WAV, M4A, OGG and FLAC — in your browser.
  7. 25 Video Converter video-converter Convert a video to MP4 (H.264) — in your browser, nothing uploaded.
IV Text tools 6 tools · 26–31
  1. 26 Word Counter word-counter Count words, characters, sentences and reading time as you type.
  2. 27 Case Converter case-converter UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.
  3. 28 Slug Generator slug-generator Clean URL slugs, with Cyrillic transliteration.
  4. 29 Text Diff text-diff Compare two texts and highlight every change.
  5. 30 Lorem Ipsum Generator lorem-ipsum Placeholder text by paragraphs, sentences or words — copy in one click.
  6. 31 Moodle GIFT Converter moodle-gift-converter Turn a pasted quiz into a GIFT file you can import into Moodle.
V Developer tools 10 tools · 32–41
  1. 32 Password Generator password-generator Strong random passwords, generated on your device with real randomness.
  2. 33 JSON Formatter json-formatter Format, minify and validate JSON — with the error line.
  3. 34 Base64 Encode / Decode base64 Text and files to Base64, and back again.
  4. 35 URL Encode / Decode url-encoder Percent-encode and decode URLs and query strings.
  5. 36 Hash Generator hash-generator MD5, SHA-1, SHA-256 and SHA-512 of text or a file.
  6. 37 CSS Gradient Generator css-gradient Build a gradient visually, copy the CSS.
  7. 38 QR Code Generator qr-generator Text or a link to a QR code you can download.
  8. 39 JWT Decoder jwt-decoder Decode a JSON Web Token’s header and payload — in your browser, never uploaded.
  9. 40 Colour Converter color-converter Convert a colour between HEX, RGB and HSL — live swatch, one-click copy.
  10. 41 Unix Timestamp Converter timestamp-converter Unix epoch ⇄ human date, both ways — local, UTC and ISO 8601.
VI Calculators 11 tools · 42–52
  1. 42 Compound Interest Calculator compound-interest-calculator Watch regular saving grow — and find the year the interest out-earns you.
  2. 43 Loan & Mortgage Calculator loan-calculator Monthly payment, full amortisation, and what overpaying actually saves.
  3. 44 Retirement Calculator retirement-calculator Both directions: what your saving buys, or what your target costs.
  4. 45 Calorie & TDEE Calculator calorie-calculator Daily calories, plus a weight projection that bends the way real ones do.
  5. 46 Percentage Calculator percentage-calculator Percent of a number, percent change, and "X is what % of Y".
  6. 47 Discount Calculator discount-calculator Sale price, what you save — and stacked discounts done right.
  7. 48 Tip Calculator tip-calculator Tip, total and the per-person split.
  8. 49 BMI Calculator bmi-calculator Body mass index, metric or imperial — with the caveats.
  9. 50 Age Calculator age-calculator Exact age in years, months and days — and the next birthday.
  10. 51 Date Difference date-difference Days between two dates — including working days.
  11. 52 Random Picker random-picker Spin a wheel, roll dice or draw names — without the same one coming up twice.
VII Maths 4 tools · 53–56
  1. 53 Circle Calculator circle-calculator Enter radius, diameter, circumference or area — get the other three.
  2. 54 Triangle Calculator triangle-calculator Type into the drawing — angles and sides fill themselves in.
  3. 55 Quadrilateral Calculator quadrilateral-calculator Two triangles on a shared edge — a quadrilateral, or a triangle cut by a line.
  4. 56 Regular Polygon Calculator regular-polygon-calculator Pick a polygon, type one measurement, and read the rest off the drawing.
A Unit converters 38 pairs
B Image converters 12 pairs
P The workbenches 2