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Calculateur de hachage de fichier

File hash calculator: compute SHA-1 and SHA-256 checksums of files locally for privacy for verification and security, with one-click copy and offline.

Mode d'emploi

Choisissez fichier et algorithme ; le hachage est calculé en direct.

Overview

File Hash Calculator is a Developer tool. Compute SHA-1 and SHA-256 checksums of files locally for privacy for verification and security, with one-click copy and offline. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Daily use of File Hash Calculator: Choose a file and algorithm to compute its hash. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use File Hash Calculator offline or on poor network — all calculations stay local and private.
  • Debug URL/Base64/JWT encoding
  • Hash and verify integrity

How to use

  1. 1 Choose a file and algorithm to compute its hash..
  2. 2 Choose encode/decode/hash and options
  3. 3 Review highlighted errors and counts
  4. 4 Copy or download the result

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Whitespace and padding matter
  • Hashing is irreversible
  • Huge payloads may use more memory

FAQ

Why did decoding fail?
Illegal characters or wrong charset are common causes.
Will my data be uploaded?
No. Everything runs locally in your browser.
How is File Hash Calculator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “SHA256, SHA1” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
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