Hash Calculator
Calculate SHA-256 hashes of text, files or decoded bytes locally, then copy or export the result.
Open
- free
- no sign-up
- on device
CRC32 Calculator
Calculate CRC32 checksums of text, files or decoded bytes in your browser — free, with no sign-up, and your input never leaves your device. Enter text, select a file or decode bytes, then copy the checksum or compare it with an expected CRC32 value.
Empty input is valid. Spaces and Unicode are preserved; no BOM is added.
Other algorithms
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Results
Choose Calculate to get a hash of your input.
Compare with expected
Enter an expected value to compare.
Text, files, keys and hashes stay in this tab. Nothing you enter is uploaded or saved.
Questions
How long is the result?
CRC32 uses CRC-32/ISO-HDLC (IEEE) and produces four bytes, shown as eight hex digits. CRC32C (Castagnoli) is a separate algorithm.
What input is hashed?
Input source: Text / Files / Encoded bytes. Empty input is valid. Spaces and Unicode are preserved; no BOM is added. Text encoding: UTF-8, UTF-16LE, UTF-16BE; Line endings: LF / CRLF. Any file type is accepted. The original bytes are hashed, not extracted document text or the filename. Files are processed one at a time in 1 MiB chunks.
How does verification work?
Select the expected algorithm and encoding explicitly. Comparison uses decoded bytes and checks the exact length. Changing output format or expected value does not reread a file.
Are my inputs saved or uploaded?
Text, files, keys and hashes stay in this tab. Nothing you enter is uploaded or saved.
Is this tool free?
Yes. This tool is free, with no sign-up and no daily limits.
Do I need an account?
No. You can use this tool without an account.
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