Free tool · files never leave your device
Hash Generator
Get the MD5, SHA and CRC32 hashes of any text or file, and check a download against its checksum.
Hashes
Worried about your website's security?
Keep your site patched, backed up and monitored.
Outdated plugins and weak setups are how most small business sites get hacked. My care plans keep everything updated, backed up and watched.
How to verify a download
- Find the checksum on the official download page (often labelled SHA-256).
- Click "Hash a file" and choose the file you downloaded.
- Paste the official checksum into "Compare with a hash". A green match means the file is exactly what the publisher released.
Frequently asked questions
What is a hash?
A short fingerprint of some data. The same input always gives the same hash, and changing even one character gives a completely different one, so hashes are used to check that files were not changed or corrupted.
Which algorithm should I use?
SHA-256 for most purposes, such as checking downloads. MD5 and SHA-1 are fine for spotting accidental changes but are no longer safe against deliberate tampering.
Can I hash passwords with this?
Not for storing them. Passwords need a slow, salted algorithm such as bcrypt or Argon2, which your website software should handle. Plain MD5 or SHA hashes of passwords are easy to crack.
Are my files uploaded?
No. Text and files are hashed in your browser and never leave your device.
More developer & marketing tools
UTM Link Builder
Build campaign tracking links for Google Analytics, with presets for ads, email and social.
JSON Formatter & Validator
Format, validate, minify and explore JSON, with exact error locations.
Meta Tag Generator
Generate SEO title, description, Open Graph and X tags with live previews.
Schema Markup Generator
Create JSON-LD structured data for businesses, articles, products, FAQs, events and more.
HTML, CSS & JS Minifier
Shrink HTML, CSS and JavaScript files for faster pages, with exact savings shown.
Case Converter & Slug Generator
Convert text to UPPER, lower, Title, camelCase, snake_case and SEO-friendly URL slugs.
URL Encoder, Decoder & Parser
Encode or decode URLs and see every part of a link, including query parameters.
.htaccess Redirect Generator
Generate 301 redirects, HTTPS and www rules for Apache and Nginx, including bulk redirects.
Regex Tester
Test regular expressions with live match highlighting, groups and find and replace.
Diff Checker
Compare two texts or code files and see every change, line by line and word by word.
Unix Timestamp Converter
Convert epoch timestamps to dates and back, in any time zone.
Markdown to HTML
Convert Markdown, including AI chat answers, to clean HTML with a live preview.
Lorem Ipsum Generator
Placeholder paragraphs, sentences, words or lists, as plain text or HTML.