TOOLS / DEVELOPER AND DATA

Developer & Data

Format, decode and compare. With a cheat sheet built into each one.

13 TOOLS0 UPLOADSFREE TO USE
FLAGSHIP
JSON Formatter
Format, validate, and minify JSON, or convert it to YAML, CSV, XML, or TypeScript.
Open the Tool → Code BeautifierBeautify or minify HTML, CSS, JavaScript, XML, and SQL.→ Regex TesterLive match highlighting and capture groups, with matches exported as a list, CSV, or JSON.→ JWT DecoderRead a token’s header, payload, and expiry, and verify it with a secret, a PEM key, or a JWKS set.→ Cron BuilderTurn plain English into cron and cron into English, with Quartz support and the next ten runs.→ Time ConverterUnix timestamps to dates and back, and one time across time zones.→ Base64 and URL EncoderBase64, URL, HTML entity, and JSON string encoding, for text or files.→ Hash GeneratorMD5, SHA, and CRC32 checksums, plus bcrypt and Argon2 password hashes.→ Password GeneratorRandom passwords and passphrases in bulk, with strength in bits.→ UUID GeneratorRandom v4 or time ordered v7, in bulk, in any format.→ Diff CheckerCompare two texts or files of any length, line by line or word by word.→ Number Base ConverterBinary, hex, and any base with the steps, plus two’s complement, bitwise, IEEE 754, and CRC.→ Truth Table GeneratorTruth tables with every step, the simplest DNF and CNF, and a Karnaugh map.→

Why run these in a browser tab

These are the lookups that interrupt real work: what a cron string actually means, which claim in a JWT carries the expiry, whether two config files differ in more than whitespace. Each one is a single page that answers the question and gets out of the way.

Open the page, paste, get the answer, close the tab. Once a tool has loaded what it needs, it keeps working with the network off.

Most carry their own cheat sheet, because the thing you actually forget is the syntax, not the tool. The regex tester lists the token reference beside the matches. The cron builder writes the schedule out in English and shows the next ten runs. The JWT decoder names every registered claim it finds.

GO DEEPER

Common questions

Do these tools upload my data?

No. Every tool on this page runs entirely in your browser. Nothing you paste or drop is sent anywhere.

Do they work offline?

Yes, once a tool has loaded what it needs. A few load a helper the first time you use a feature, like the minifier in the code beautifier; after that they keep working without a connection.

Is there a limit on file or input size?

There is no imposed limit. The practical ceiling is your browser's memory, which in normal use means multi-megabyte files are fine.