QR64Code generates MD5, SHA-1, SHA-256, and bcrypt for text, plus SHA-256 for files. MD5 and SHA-1 are included only for legacy integrity checks and should not be used in new security designs.
What changed in this update?
The tool, explanation, limits, sources, and accessible form flow were reviewed together.
How to use it
- 1
Use the text section or choose a file for checksum.
- 2
Select the required algorithm and generate the value.
- 3
Compare the result character-for-character with the expected checksum.
Limits and security notes
Do not enter a real password into an online tool. Even though this tool runs locally, production password storage should use a current server-side password hashing library with appropriate cost settings.
Comparison
| Algorithm | Output | New use |
|---|---|---|
| MD5 | 128 bit | Do not use for security |
| SHA-1 | 160 bit | Do not use for security |
| SHA-256 | 256 bit | File integrity |
| bcrypt | Salt + cost | Password hashing |
Frequently asked questions
Are hashing and encryption the same?
No. Encryption is reversed with a key; a secure hash is designed for one-way comparison.
What does a file checksum verify?
It checks whether the downloaded file matches the value published by its source.
Why is MD5 included?
It supports comparison with legacy checksums; it is not recommended for new security systems.