Developer tools

Local formatters and helpers for development work.

JSON Formatter

Format, validate, or minify JSON locally in your browser.

Base64 Encoder / Decoder

Encode UTF-8 text as standard Base64 or decode Base64 to text locally.

URL Encoder / Decoder

Encode a UTF-8 URL component or decode percent-encoded text locally without opening it.

UUID Generator

Generate one or a bounded batch of random UUID v4 identifiers locally.

Hash Tools

Generate SHA-256, SHA-512, or CRC32 hashes from UTF-8 text locally in your browser.

Text & Fonts

Create copyable strikethrough, bubble, cursive, and small-cap Unicode text in your browser.

Clock & Timer

Use a countdown timer, stopwatch, or local digital clock in your browser.

File Tools

Create ZIP archives, extract ZIP files, or preview batch-renamed copies locally in your browser.

Device Tests

Observe keyboard, mouse and screen interactions locally in your browser.

Symbols

Copy named text symbols for arrows, hearts, stars and check marks.

License

Look up CC0, MIT, Apache 2.0 and precise GNU GPL versions with conditions and official sources.