# File Checksum Verifier

> Verify File Integrity with Cryptographic Hashes

Verify file checksums after downloading. Compute MD5, SHA-1, SHA-256, SHA-512 hashes from any file. 100% private, no upload, no signup.

URL: https://tools.scoreroute.com/tools/file-checksum-verifier/

Markdown: https://tools.scoreroute.com/tools/file-checksum-verifier/.md

## Upload File to Verify

Drag and drop a file here, or click to select

Any file type, any size

Computing hashes...

Hash algorithms:


### Compare with Expected Hash


### What is a File Checksum Verifier?

A file checksum verifier computes a cryptographic hash of a file so you can confirm it matches the expected value. This is essential for verifying that downloaded files have not been tampered with or corrupted.


### How to Verify a File

- Upload or drag your file into the box above
- Select the hash algorithms you need
- Click "Compute Hashes" and wait for the result
- Copy the hash or compare it with the expected value


### Hash Algorithms Explained


### Common Use Cases

- **Download verification:** Confirm Linux ISO, software installers, or archives match the publisher's published hash
- **Integrity check:** Verify file transfers via USB, email attachments, or cloud storage were not corrupted
- **Backup validation:** Confirm a backup copy matches the original
- **Forensic verification:** Prove a file has not been altered since a known baseline


### How This Tool Works

Your file never leaves your browser. It is read locally using the FileReader API, and hash computation happens entirely on your device via the Web Crypto API. No data is uploaded to any server.


### Why Not Just Ask AI?

AI language models cannot access your local files or compute cryptographic hashes. They also cannot reliably compute MD5 or SHA hashes from large files. This tool runs directly in your browser for accurate, reproducible results every time.


### Frequently Asked Questions

**Is my file uploaded anywhere?**

No. All computation happens locally in your browser using the FileReader API and Web Crypto API. Your file never leaves your device.

**Which hash algorithm should I use?**

For most verification purposes, SHA-256 is the recommended choice. It provides a good balance of speed and security. Use SHA-512 when maximum security is required. MD5 and SHA-1 are deprecated for security but still widely used for non-security checksum purposes.

**Why does the hash take time for large files?**

Large files are read and processed in chunks to avoid freezing the browser. You will see a progress bar for files over a few megabytes.

**Can I verify a hash I got from a download page?**

Yes. Paste the expected hash from the download page into the "Compare with Expected Hash" box. The tool will tell you if it matches any of the computed hashes.

**What happens if the hashes do not match?**

If the hashes do not match, your file may have been corrupted during download, truncated, or tampered with. Re-download the file and verify again.


#### Related Tools

- [Hash Generator](/tools/hash-generator/)
- [Base64 Encoder](/tools/base64-encoder/)
- [JSON Formatter](/tools/json-formatter/)

## References

- [IETF — RFC Index](https://www.rfc-editor.org/)
- [IANA — Protocol Registries](https://www.iana.org/protocols)