Free browser tools for development and web work
No sign-up or installation. Your input is processed in your browser and is not sent to a server.
Main categories
- Tools for everyday development and web work, including formatting, encoding, generation, and validation.
- Tools for counting, reviewing, and transforming text.
- Tools for converting units, timestamps, numeric representations, and other formats.
- Tools for quickly calculating dates, percentages, tax, and other values.
Popular tools
- Format or minify JSON instantly. Everything runs in your browser — no data is uploaded.
- Generate a QR code image from text or a URL and download it as a PNG.
- Calculate 'B% of A', 'A is what % of B' and percent change instantly. Great for discounts.
- Convert length, weight, and volume units between metric and imperial systems.
- Count characters, words and lines in real time. Perfect for social posts and manuscripts.
- Encode text to Base64 or decode Base64 back to text. UTF-8 aware and runs entirely in your browser.
New tools
- Test a regular expression against text, highlight matches, and inspect capture groups.
- Convert colors between HEX, RGB, and HSL, with a color picker and live preview.
- Decode a JWT (JSON Web Token) header and payload. Signature verification is not performed.