Developer Tools
21 of 21 liveFormatters, validators, encoders and decoders that parse in your browser tab.
Format, validate and minify in one pane, with the error line marked.
Text and files, with the URL-safe alphabet as an option.
Header, payload and expiry — without sending the token anywhere.
Line by line, with the changed words marked — the way a code review shows it.
Live matches, capture groups and a cheat sheet beside them.
Check a document against a JSON Schema and list every violation.
Strip every space and newline, keep the data identical.
Indent XML and fold long attribute lists down to size.
Convert either way and keep the attributes intact.
Header row, custom delimiters and typed values.
Flatten nested objects into columns you can open in a spreadsheet.
Re-indent markup and close the tags someone forgot.
Drop comments and whitespace without breaking inline elements.
One declaration per line, sorted the way you prefer.
Shrink a stylesheet and see exactly how much you saved.
Make minified or machine-written JavaScript readable again.
A quick size check for a snippet before you ship it.
Decode back to text or to a downloadable file.
Percent-encode query strings and paths without guesswork.
Read a long tracking URL back into something human.
v4 and v7, one at a time or ten thousand at once.
What you paste into these is usually a secret
A JWT is access. An API response carries customer names. A log line often carries both. Meanwhile most online formatters post what you pasted to someone else's server and parse it there — fine for a toy input, a habit people regret with anything real. Everything in this section is parsed by your browser's own parser, in the tab you already have open.
The practical gain beyond privacy is speed: no upload, no queue, no round trip. The cost is size — a tab will not chew through a 500 MB dump, so the input is capped rather than left to freeze the page. Formatters make a payload readable, validators point at the exact place it breaks, encoders move between Base64, URL escaping and HTML entities.
What is coming next
21 of the 21 are live today. The rest are being added in batches, and each one is listed as it lands. If a tool you need is still marked as coming and you want it sooner, say so — the order is not fixed.