Hash & Checksum Tools
Generate MD5, SHA-1, SHA-256, SHA-512 and HMAC digests, and verify a downloaded file against a published checksum — all computed in your browser.
Generate MD5, SHA-1, SHA-256, SHA-512 and HMAC digests, and verify a downloaded file against a published checksum — all computed in your browser.
SHA-256 Hash Generator
Turn any text into its 64-character SHA-256 digest — computed in this tab, never sent to a server.
MD5 Hash Generator
Produce the familiar 32-character MD5 digest without handing your input to anyone.
SHA-1 Hash Generator
Get the 40-character SHA-1 digest for any string, without an upload.
SHA-512 Hash Generator
A 512-bit digest, 128 hex characters, computed in this tab.
HMAC Generator
Keyed message authentication — the correct way to prove a message came from someone holding the key.
File Checksum Verifier
Check whether a download matches the checksum the publisher printed — the file never leaves your machine.
Hash Algorithm Comparison
A short decision table, because the answer depends on whether an attacker can choose your input.
Why these run locally
Every tool on this page processes its input in the browser tab. For this category that matters because the inputs are frequently sensitive: digests of passwords and keys, authentication tokens, spreadsheet exports containing personal data, photographs of identity documents. None of that is transmitted, and the tools keep working if you disconnect from the network after the page loads.
Other categories
- Encoding & Decoding tools — Base64, Base64URL, percent-encoding, HTML entities, hexadecimal, binary and JWT.
- Text Tools tools — Count words, convert naming conventions, deduplicate and sort lists, generate slugs and placeholder text, and extract structured values out of prose.
- Data Converters tools — Convert between JSON, CSV, YAML and XML with correct escaping, type handling and error reporting — plus a strict JSON validator.
- Image Tools tools — Compress, resize and convert images in the browser.
- PDF Tools tools — Assemble JPEG and PNG files into real PDF documents.