Tools · run in your browser
File tools
Small utilities for testing with files. They run entirely on your device — nothing is uploaded.
All tools
Custom file generator
Any exact byte size, or CSV/JSON/NDJSON with any number of rows, built in your browser.
Tool
File type inspector
Identify a file from its magic bytes and catch mislabeled extensions.
Tool
Checksum calculator
MD5, SHA-1, SHA-256, SHA-384 and SHA-512 of any file, with a compare box.
Tool