CompressFree
100% privacy focused

Free Developer Tools

Format, validate, encode, decode, and clean developer data directly in your browser.

JSON Formatter

Format messy JSON into readable indented output.

Start tool

JSON Validator

Validate JSON syntax and find parse errors.

Base64 Encoder

Encode text to Base64.

Base64 Decoder

Decode Base64 into readable text.

URL Encoder

Encode text for safe use in URLs.

URL Decoder

Decode percent-encoded URL text.

Why use browser-based tools?

Fast local processing

Many tools avoid upload and download wait time by running directly in your browser.

Clear privacy boundaries

CompressFree labels whether a tool runs locally or needs server-side processing.

Useful after load

Client-side text, image, and QR tools can continue working after the page is loaded.

Choose a tool above

Start with the focused task page, then move between related tools.