Free Developer Tools

Format, validate, encode, and decode — the daily dev toolkit.

13 free tools · no sign-up · runs in your browser

Our free developer tools are the daily utilities you keep reaching for — a JSON formatter and validator, XML formatter, regex tester, JWT decoder, Base64 and URL encoders, a UUID generator, hash generator, color converter, and Unix timestamp converter. Format a messy API response, test a pattern against sample text, or decode a token in seconds.

Base64 Encoder / Decoder

Developer

064

URL Encoder / Decoder

Unix Timestamp Converter

Every developer tool, explained

{}JSON FormatterBeautify, minify, and inspect JSON with error reporting.J✓JSON ValidatorValidate JSON and pinpoint exactly where it breaks.</>XML FormatterPretty-print and indent XML documents.X✓XML ValidatorCheck XML for well-formedness and structural errors.ReRegex TesterTest regular expressions against sample text with live matches.JtJWT DecoderDecode JWT header and payload without sending it anywhere.64Base64 Encoder / DecoderEncode and decode Base64 text, both ways.%2URL Encoder / DecoderPercent-encode and decode URLs and query strings.UiUUID GeneratorGenerate v4 UUIDs in bulk, ready to copy.#hHash GeneratorCreate SHA-1, SHA-256, and SHA-512 hashes from text.CoColor ConverterConvert colors between HEX, RGB, and HSL.TsUnix Timestamp ConverterConvert between Unix timestamps and human dates.&;HTML Entity EncoderEscape and unescape HTML entities safely.

About these developer tools

Every tool runs locally in your browser, which matters for developers: you can paste payloads containing tokens, internal IDs, or customer data without it ever touching a server. There's no sign-up and nothing to install — just fast, focused utilities that do one job well and put the result one click from your clipboard.

Developer Tools — frequently asked questions

Is my data sent to a server?

No. All developer tools process data locally in your browser, so sensitive content like tokens and API payloads never leaves your device.

Can the JSON tool both format and validate?

Yes. The JSON Formatter beautifies and minifies while reporting parse errors, and there's a dedicated JSON Validator for a focused pass/fail check.

Does the JWT decoder verify signatures?

It decodes the header and payload for inspection but does not verify the signature — and your token never leaves the browser.

Are these developer tools free?

Yes, every developer tool is free with no account and no usage limits.

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