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Image Similarity Checker Online

Drop two images to compare visual similarity, detect crops, re-encodes, and edits in your browser without uploads.

Client-side perceptual hashing (pHash & dHash) in your browser.
Clear similarity verdict for re-encodes, crops, edits, and different files.
Local comparison: images never upload to external servers.

Detecting whether a suspect file matches an original photo requires perceptual image comparison. Re-saving, cropping, resizing, and platform compression change raw file bytes while keeping the visual structure intact.

This free online image similarity checker compares two images side-by-side using client-side perceptual hashing (pHash and dHash) directly in your browser. It calculates Hamming distance and tells you whether the files are visual matches, modified variations, or entirely unrelated.

Because all image decoding and hash calculations run locally, your photos never leave your browser. For digital artists and photographers investigating leaked media, visual matching tells you whether a file is worth a forensic watermark check with Foddo Inspect.

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Workflow Upgrade

Move from one-off checks to repeatable protected delivery

Visual comparison is step one in a leak investigation. Close visual fingerprints suggest the same image, which tells you whether Inspect is worth trying next. Similarity alone does not identify which subscriber leaked.

Leak response

Leak Response Playbook & Incident Checklist

Generate a first-hour incident checklist when content leaks: preserve evidence, check similarity, and recover subscriber IDs.

EXIF & metadata

Remove EXIF Data & GPS from Photos Online

Remove EXIF, GPS, and camera metadata from photos right in your browser. Free, with no uploads.

Watermark maker

Add Watermark to Image Online: Free Watermark Maker

Add custom text watermarks to images online with live opacity and placement controls, then export locally.

Social sizing

Social Media Image Resizer & Crop Online

Resize and crop images for Instagram, X, Patreon, and web platforms in your browser, with no uploads.

Distribution prep

Subscriber CSV Validator & Formatter Online

Validate recipient CSV lists for batch delivery. Catch duplicate IDs and unsafe characters locally.

Method picker

Invisible Watermark Survival Simulator

Pick the right invisible watermark method for your delivery scenario with honest survival limits.

Delivery checklist

Content Delivery Readiness Checklist & Score

Track your pre-release checklist across metadata, watermark, license, and CSV tools.

License & delivery

Content License Notice & Rights Generator

Generate license text, metadata-safe fields, and filename conventions for premium content delivery.