What InstaHasher is
InstaHasher is a free online hash generator and file checksum checker published by Dynamic Foundries. It calculates common digests from text or local files without requiring an account. Developers, system administrators and other users can generate values for interoperability or compare downloaded bytes with a checksum from a trusted publisher.
Tool inputs are processed in the browser and are not uploaded to InstaHasher. The site is operated by SASU Dynamic Foundries, an independent software publisher registered in Paris, France (RCS Paris 102 801 206).
What We Offer
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512, Keccak-256, Keccak-512, RIPEMD-160 and four HMAC variants from text or files.
Checksum Calculator
Drag and drop any file to calculate its MD5, SHA-1, SHA-256, and SHA-512 checksums. Includes a verification field to compare against an expected hash value.
Hashing Guide
A source-backed guide explaining what hashing is, its security properties and limits, and common uses in integrity checks, signatures and specialized password hashing.
Algorithm Comparison
A side-by-side comparison of MD5 and SHA-256 covering digest length, collision resistance and suitable checksum uses.
Privacy by Design
Hash and HMAC calculations run client-side in JavaScript. The checksum calculator uses Web Crypto for SHA-1, SHA-256 and SHA-512 and the locally served CryptoJS library for MD5; the main generator uses the local CryptoJS library. Text, file contents and HMAC keys entered in the tools are not sent to InstaHasher.
We use minimal analytics (Google Analytics) to understand how many people visit the site and which features are most popular. We do not use advertising trackers, fingerprinting scripts, or third-party data brokers. For full details, see our privacy policy.
Contact
Have a question, found a bug, or want to suggest a feature? We would love to hear from you.
Facts and implementation last reviewed: .