ZANCTA

/tools/utility

Verify a file's checksum — locally

Compute a file's SHA-256, SHA-384, SHA-512, SHA-1, or MD5 checksum in your browser and compare it against the value a download page published. Files are hashed in chunks on your device — never uploaded.
Local processing

Tool details

local boundary
Formats
ANY FILE
Limits
Up to 100 MB per file · 1 file
Processing
Processing stays in this browser after the page loads.
Result
Download or copy the result from this tab. Nothing is stored on ZANCTA.

Checksum workspace

Hash a file or text with SHA-256, SHA-384, SHA-512, SHA-1, or MD5 — then compare against the checksum a download page gave you.

Local processing

Processed in this tab. File bytes are not uploaded. How local processing works

Files are hashed in 8 MB chunks inside this tab. MD5 is included for compatibility with older checksum pages — prefer SHA-256 or better for anything security-sensitive.

Free, no upload — pass it on:

Before you start

A clear path through File Checksum.

Review the input, the visible limits, and the expected result before you choose a file. The workspace remains the primary place to do the task.

  • Check the input

    ANY FILE supported · up to 100 MB per file · up to 1 file.

  • Keep the boundary visible

    Selected file bytes are processed in this browser for this supported local workflow.

  • Review the result

    Wait until the tool finishes, inspect the output, then download or clear the workspace.

FAQ

Is the file uploaded?
No. The file is read in 8 MB chunks and hashed in this tab — open the network tab and watch: no upload request is made.
Which algorithms are supported?
SHA-256, SHA-384, SHA-512, SHA-1, and MD5. Paste an expected checksum and the tool can detect the likely algorithm from its length.
Should I use MD5?
Only to match an existing MD5 checksum — it is included for compatibility. Prefer SHA-256 or SHA-512 for anything security-sensitive.
Can I hash text instead of a file?
Yes — paste text to hash it with the same algorithms, useful for verifying tokens or signatures.

Processing runs locally in your browser — no upload. Outputs are generated on-device. For the privacy boundary see the local processing guide.