File checksum
Calculate a SHA-256, SHA-384 or SHA-512 file checksum.
Your workspace
On-device processingLoading the tool…
Your files and text are processed in this browser. They are not uploaded to our server. Closing or refreshing the page clears your work.
How to use this tool
- Calculate a SHA-256, SHA-384 or SHA-512 file checksum.
- Enter your content or select files, review the options and click Run tool. Example values are provided for text and calculations.
- Review the result, then copy or download it. Keep originals; closing the page clears your work.
Before you start
Text: 200,000 characters; JSON: 50 levels and 20,000 nodes. Regex runs in a worker with a 1.5-second limit. JWT decoding does NOT verify authenticity. File hashes accept up to 50 MB. Treat keys and tokens as sensitive; nothing is saved by the tool.
Quick answers
Does this tool send my input to a server?
No. Your input is processed in this browser. Download the result before closing the page; your workspace is not saved to an account.
What should I check before using the result?
Keep the original. Check the output’s content, layout, quality and format before sharing it or using it for important work. Review the limitations above for details.
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