SHA Hash Generator
Generate a SHA-256, SHA-384 or SHA-512 fingerprint of entered UTF-8 text.
Maximum 500,000 characters. Use synthetic examples instead of secrets.
Local processing · No account · Input is not uploaded by this tool
How to use this tool
- Choose the relevant options. Set the operation, format or algorithm before running. The options above define how the result is interpreted.
- Enter data or load an example. Exact text hello produces the documented SHA-256 known vector.
- Run and inspect the feedback. Use the primary action, then read the status message. An error clears old output so it cannot be mistaken for a fresh result.
- Copy, download or start again. Copy and Download become available when a current nonempty result exists. Reset clears the text result; no input is stored by this site.
How it works
Web Crypto SubtleCrypto.digest hashes TextEncoder bytes and converts the digest to lowercase hexadecimal. The UI reports UTF-8 input byte count.
The computation is performed by this page’s JavaScript after you choose Run. Input and results are kept in the current tab’s memory. There is no background submission, analytics event containing your input, or server-side conversion in this build.
Practical example
Use Load example to try the supported format, then change one value and run again. Comparing those two results is a quick way to understand what the operation changes and what it preserves. The linked guides below provide worked examples for the edge cases relevant to this utility.
Common mistakes
Trailing spaces and final newlines change the digest. A plain hash neither authenticates a sender nor protects a guessable secret.
Limits and unsupported tasks
Requires HTTPS or localhost and Web Crypto. No streaming or file-byte hashing. Text controls can normalize line endings. No MD5, SHA-1, HMAC, signatures or password-storage workflow. Maximum input: 500,000 characters.
Privacy and handling sensitive data
Do not use real passwords as experiments. A fast digest of a predictable secret is not a safe way to share that secret. The browser hashes text locally, and the implementation never submits the input or digest to a verification endpoint. Copy and Download use your device. Browser extensions and hosting logs have separate boundaries, explained in the privacy policy.
Usage guides
Questions, answered
Does the SHA Hash Generator upload my input?
No. The implementation processes it in your browser and does not submit it to a server. Ordinary page requests still reach the hosting service.
Why did Copy or Download become unavailable?
The input changed or validation failed, so the previous output was cleared. Run the tool again to create a current result.
Can I use this for every production workflow?
Requires HTTPS or localhost and Web Crypto. No streaming or file-byte hashing. Text controls can normalize line endings. No MD5, SHA-1, HMAC, signatures or password-storage workflow. Maximum input: 500,000 characters.