When to use this tool
Calculate a SHA-256 checksum of the bytes represented by Base64. Decode first so the digest describes the payload, rather than its encoded text.
Example
Use “Try example” to load this public sample and its settings, then run it.
Input
SGVsbG8sIHdvcmxkIQ==
Result
315f5bdb76d078c43b8ac0064e4a0164612b1fce77c869345bfc94c75894edd3
How the result is produced
Conventions and limitations
A checksum alone does not authenticate a sender. Matching a trusted digest requires the same byte encoding, line endings and trailing newline conventions.
How to use this page
- Paste your input or open a local file.
- Adjust tool options if needed, then choose Run tool.
- Copy the result or download the original output bytes.
Inputs and results are not added to the public catalogue or saved in the URL. Processing happens in your browser; HTTP Request and DNS over HTTPS send the requests you explicitly run. Files up to 128 MiB can be opened; decompression and image tools may have smaller processing limits. Large results have a shortened preview. Text and HTML downloads use UTF-8; binary downloads preserve output bytes. Pasted text follows browser newline handling; open a file when exact input bytes matter.