Hash Generator (MD5, SHA-256 & more)
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of text in your browser. Nothing leaves the page; ideal for checksums. Free, instant.
About this tool
Compute cryptographic hash digests of any text. Leave the algorithm blank to see MD5, SHA-1, SHA-256, and SHA-512 side by side, or name one (md5, sha256, sha512) to get just that digest on a single line, ready to copy into a comparison.
The SHA family runs on the browser's built-in Web Crypto implementation. Because everything stays on your device, it is safe to hash values you would never paste into an uploading tool.
Common uses
- Verify a downloaded file's published checksum against its contents.
- Generate a cache key or deduplication fingerprint for a string.
- Compare configuration blobs across environments by digest.
Automate via API
The same conversion is available as a REST endpoint for scripts, pipelines, and backends:
curl -X POST https://payloadly.com/api/v1/tools/hash-generator \ -H "Content-Type: text/plain" \ -H "X-Api-Key: YOUR_API_KEY" \ --data-binary @input.txt
Frequently asked questions
Is my data uploaded to a server?
No. This tool runs entirely in your browser using JavaScript, and there are no ads on the page. Nothing you paste or drop here is uploaded, logged, or stored, and you can verify that yourself: open your browser's developer tools and watch the Network tab while you convert (no requests leave the page), or disconnect from the internet after the page loads and keep working.
Is MD5 safe to use?
Not for security. MD5 (and SHA-1) are broken against deliberate collisions, so never use them for passwords, signatures, or integrity against an attacker. They remain fine as checksums against accidental corruption and for cache keys, which is why they still appear everywhere.
Can I reverse a hash back to the original text?
No. Hashing is one-way by design; the only 'reversal' is guessing inputs until one matches, which is why short or common inputs (like passwords) can be cracked by lookup tables. For password storage, use a slow, salted algorithm like bcrypt or argon2, not a plain hash.
Is there a size limit or a fee?
The browser tool is free with no signup and comfortably handles files up to tens of megabytes (limited by your device's memory). For automated or bulk processing inside your own scripts and pipelines, use the paid REST API.
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