Browser tool

Image Hash Generator

Generate SHA-256/1/512 file hashes with duplicate flags — in your browser.

File hash · SHA-256/1/512 of raw bytes (not a perceptual hash).

Use tool

Drop your files here

click to browse, or press Enter; select several files or drag them in

Hash algorithm

A cryptographic hash of the raw file bytes. SHA-1 is included for compatibility; SHA-256 or SHA-512 are preferred.

Report format

Choose an algorithm and format, then click Process.

Choose a file to begin.

File: —
Output: —

Image Hash Generator computes SHA-256/1/512 of raw file bytes with Web Crypto in your browser; nothing is uploaded.

Result will appear here.

How this tool works

What it does

Computes SHA-256/SHA-1/SHA-512 of raw file bytes and flags duplicate hashes.

Not perceptual

A byte-level checksum, not a visual image hash.

Batch

Hashes many files; skips unreadable ones with a reason.

Privacy

Hashing uses Web Crypto in your browser; nothing is uploaded.

Image Hash Generator in your browser

Image Hash Generator computes a cryptographic hash of one or more files from their raw bytes, using SHA-256, SHA-1 or SHA-512. It is a byte-level checksum, not a visual or perceptual image hash, so two visually similar images will have completely different hashes.

Select any number of files. Each is size-checked individually and hashed; identical hashes are flagged as duplicates, and any file that cannot be read is listed as skipped while the rest still hash.

Download the results as plain text, CSV or JSON. Everything runs in your browser with the Web Crypto API.

How to use Image Hash Generator

Select one or more files in Image Hash Generator (you can pick many at once).
Choose the hash algorithm and the report format.
Click Process to hash every file and flag any duplicates.
Download the hash report as TXT, CSV or JSON.

Why use Image Hash Generator

Multiple algorithms

SHA-256, SHA-1 or SHA-512 over the raw file bytes.

Duplicate flags

Identical hashes are marked so you can spot exact duplicates.

Batch + resilient

Hashes many files at once; unreadable ones are skipped, not fatal.

Export formats

Download as TXT, CSV or JSON for spreadsheets or scripts.

Common uses for Image Hash Generator

Integrity checks

Verify a file has not changed by comparing its hash.

Deduplicate

Flag byte-identical files across a selection.

Build manifests

Export a CSV/JSON list of file hashes for records.

Transfer verification

Confirm a downloaded or copied file matches the source.

Frequently asked questions

Is the hash from Image Hash Generator a visual or perceptual hash?

No. It is a cryptographic hash of the raw file bytes (SHA-256, SHA-1 or SHA-512). Any change to the bytes changes the hash, so visually similar images do not match.

Which algorithms does Image Hash Generator support?

SHA-256 by default, with SHA-1 and SHA-512 also available. SHA-1 is included for compatibility with older systems; SHA-256 or SHA-512 are recommended for integrity checks.

Can Image Hash Generator hash several files at once?

Yes. Select multiple files and each is hashed separately, with duplicate hashes flagged. A file that cannot be read is skipped with a reason and the rest still hash.

What report formats does Image Hash Generator produce?

Plain text, CSV or JSON. CSV and JSON mark each file as UNIQUE or DUPLICATE and include the algorithm, sizes and hashes for spreadsheets or scripts.

Are my files uploaded to hash them?

No. Hashing uses the browser's Web Crypto API on this page; no file is sent to a server.

Related image tools

Tools that pair well with Image Hash Generator.