Developer tools

Everyday developer utilities that never send your payloads to a server — useful when the data you are debugging is not yours to share.

JSON formatter & validator

Developer tools

Beautify, minify and validate JSON with error positions

Runs in your browserOpen

Base64 encoder & decoder

Developer tools

Encode text or files to Base64 and back

Runs in your browserOpen

Hash generator

Developer tools

Compute MD5, SHA-1, SHA-256, SHA-512 and CRC32 hashes

Runs in your browserOpen

URL encoder / decoder

Developer tools

Percent-encode or decode URLs, and build query strings

Runs in your browserOpen

CSV to JSON converter

Developer tools

Convert CSV to JSON and back, with full formatting control

Runs in your browserOpen

Color converter & palette tool

Developer tools

Convert colours between formats and build palettes

Runs in your browserOpen

Markdown to HTML converter

Developer tools

Convert Markdown to clean, styled HTML instantly

Runs in your browserOpen

Unix timestamp converter

Developer tools

Convert Unix timestamps to dates and back, in any timezone

Runs in your browserOpen

Why run developer tools in the browser?

Most online tools work by uploading your file to a server, processing it there and handing back a download link. That means a copy of your document exists on someone else's machine, at least for a while.

Every tool in this category avoids that entirely. The processing code is downloaded to your browser and your file is read locally, so the work is faster, private by default, and keeps working even when your connection drops.