Tools
Developer tools
Small, fast utilities that run entirely in your browser — no uploads, no sign-up. Built to pair with the file format reference.
File analyzer
Identify a file’s format from its magic number in the browser. Nothing is uploaded.
Base64 encode / decode
Convert text to and from Base64 in your browser. UTF-8 safe, nothing is uploaded.
Hash calculator
Compute SHA-256, SHA-1, and SHA-512 hashes of text or a file, locally.
MIME type lookup
Find the MIME type and magic number for a file extension across known formats.
Hex viewer
Inspect text or a file as a hex dump with offsets and ASCII, in the browser.