The collection / 43 tools
Word counts, file conversions, JSON formatting, and a drum machine.
Format or minify JSON and check for syntax errors.
Make QR codes for links, text, contacts, and Wi-Fi details.
Convert images between PNG, JPEG, WebP, and other formats.
Generate passwords with your chosen length and character sets.
Count words and characters, then estimate reading and speaking time.
Convert length, weight, volume, and temperature measurements.
Find shared working hours across time zones and export a meeting.
Scale an ingredient list to new servings, including fractions.
Compare a local file with its published SHA-256 checksum.
Convert English to Pig Latin and decode Pig Latin back to English with deterministic rules for punctuation, capitalization, hyphens, and apostrophes.
Convert audio files between MP3, WAV, and other formats.
Encode and decode UTF-8 text and files as Base64 or URL-safe Base64 in your browser without uploading data.
From the guides
Radius 2 cm · Height 5 cmA wraparound label covers the curved wall. Unroll it into a rectangle that is 5 cm tall and one circumference wide. The two circular ends account for the rest of the closed surface area.
Check the same cylinder in the 3D Shape Visualizer and see what happens when you double its dimensions.
Work through the cylinder exampleHi 👩💻!An emoji can contain several Unicode characters. Here, the woman, joiner, and laptop form one visible symbol. Text Counter treats it as one character in browsers with Intl.Segmenter; JavaScript’s string length counts the same text differently.
For a form with a length limit, check its own counter after pasting.
How character counts work00127 → 127The CSV converter infers numbers automatically, even inside quoted fields. That works for quantities, but removes leading zeros from IDs. Compare the output with the source; quoting 127 afterward won’t bring the zeros back.
For a dataset with identifier columns, use an importer that preserves those columns as strings.
CSV types and quoted fields