Image File Fingerprint
Calculate a SHA-256 file digest and inspect dimensions and transparency counts.
Drop your image here
Drag and drop, or choose a file below
JPG · PNG · WEBP
Maximum file size: 20 MiB
Each image: up to 16 megapixels and 8192 px per side
Equal-looking images can have different hashes after encoding or metadata changes. This is an exact-file fingerprint, not visual similarity or proof of authenticity.
Original
Choose an image or try the sample to see your preview here.
100% local processing
How to use
- 01
Choose an image or try the local sample.
- 02
Choose a JPG, PNG or WebP file up to 20 MiB, then process it.
- 03
Review the result and download the file.
Details and tips
How it works
SHA-256 hashes the original file bytes, including metadata. The report also records decoded orientation-aware dimensions and counts fully transparent, translucent and opaque pixels.
Made for everyday images
Check exact file duplicates, record asset checksums and audit transparency.
Frequently asked questions
Are images uploaded?
No. Processing, previews and downloads stay on your device.
What are the limits?
Original files up to 20 MiB; images must also fit the pixel limits.