Format and conversion tools

Formats multiply: megabytes to gigabytes, decimal to hex, #RRGGBB to rgb(), PNG to WebP. These converters handle the everyday format changes that show up in code, designs, and specs — with explicit formulas, clear units, and no upload required.

Popular tools

Data Size Converter Stable Convert between bits and bytes — KB, MB, GB, TB, PB — with decimal (SI) precision, exact arithmetic, fully local.

Hex to RGB Converter Stable Convert hex color codes to RGB triplets and back — instantly, with 3- and 6-digit shorthand support, fully local.

Number Base Converter Stable Convert integers between binary, octal, decimal, and hexadecimal with exact BigInt arithmetic — no rounding, fully local.

Unit Converter Stable Convert length, weight, temperature, volume, and speed between metric and imperial units with exact conversion factors.

Image Compressor Stable Compress JPG and WebP images with a quality slider, live size savings and dimensions, processed fully on your device.

JPG, PNG & WebP Converter Stable Convert images between JPG, PNG, and WebP with a quality control — locally, with live size and dimension stats.

Image Resizer Stable Resize JPG, PNG, WebP, and GIF images to any maximum dimension, preserving aspect ratio — on your device.

Developer text and JSON toolkit Format, minify, validate, convert, and diff JSON and text — plus regex testing and token counting for LLM work. Password, hashing, and security tools Generate strong passwords, hash text with SHA-2, decode JWTs, and encode data — security utilities that run entirely in your browser.