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IMAGE TOOLSDuplicate Image Finder
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SMART PHOTO ORGANIZATION / LOCAL PROCESSING

Duplicate Image Finder

Detect identical files and lookalike photos, compare them side by side, and build a review list. Your images stay on your device.

SHA-256Exact file matching
pHashVisual similarity
0 uploadsPrivate local analysis
01

Add your images

Files or a whole photo folder

Drop photos to begin

Or choose images from your device

JPG, PNG, WebP, GIF, BMP, AVIF and other supported raster formats
Ready to scan0 images

Add at least two images to find matches.

Broader matchesStricter matches

Similar-photo scores are estimates, not guarantees. Exact matches are verified using file bytes.

Files are read locally and never uploaded. Filename and relative folder information may appear in exported reports. Your originals are never moved or deleted.
IMAGES ADDED0Total input files
EXACT GROUPS0Identical bytes
SIMILAR GROUPS0Visual lookalikes
MARKED FOR REVIEW00 B total
02

Review your matches

Groups, comparisons and careful selections

✦▧✦

Make room for what matters

Upload at least two images and scan to see exact duplicates and similar photos, with side-by-side comparisons here.

01 · Add images02 · Analyze03 · Review matches
03

Export your report

Share the findings, not the original photos

Reports contain filenames, relative paths (when selected from folders), file metadata, hashes, match groups, and your review selections. No original image bytes are included.

Two ways to find repeats

≡

Exact duplicates

SHA-256 compares every byte. Files with identical content match even when names differ; recompressed versions won't be considered exact.

◎

Similar photos

A perceptual image hash and color fingerprint find likely resized, compressed, or reformatted copies. Review the actual photos before deciding.

☑

Safe review workflow

Mark candidates, compare side-by-side and export a report. No deletion, remote upload, or automatic file modification.

Frequently asked questions

Do my images leave my device?

No. Image decoding, SHA-256 hashing, and similarity calculations run entirely in your browser. Reports download locally. This tool does not send images to an API.

Can the tool detect edited or resized copies?

Often, but not always. Perceptual matching uses image appearance rather than file bytes, so resized or compressed versions may group together. Heavy cropping, rotations and dramatic edits can change the score.

Will it delete duplicate photos?

No. The tool is intentionally non-destructive. Mark files for review and export the list, then decide what to do using your device's file manager.

What are the browser limits?

Up to 400 images, 80 MB per file, and 1.5 GB of selected files per scan. Files the browser cannot visually decode can still be checked for exact-byte duplicates; preview and similarity may be unavailable. Empty or unsupported selections are reported. Selecting a file again adds another copy to the queue. Animated images use their first displayed frame for similarity; exact matching still uses the complete file bytes.

IMAGE COMPARISON

Side-by-side review

First image being compared

Second image being compared

Using Duplicate Image Finder

Choose images or a supported folder and analyze the queue. Distinguish exact byte matches from visual candidates, compare pairs and mark review choices. Export the findings and inspect sensitive filenames/paths before sharing.

Similarity is heuristic, not a calibrated probability or identity guarantee. Crops, rotations, animation and edits can affect matching; visual analysis uses a decoded first frame. SHA-256 needs supported WebCrypto/secure context and buffers file data. Resource/decoder limits apply. The tool does not rename, move, delete or upload files; reports can expose filenames, paths and hashes.

Workflow and output choices for Duplicate Image Finder

Queue supported images or a folder, distinguish exact byte matches from heuristic visual candidates, compare pairs and mark review choices before exporting a report.

Exact grouping uses SHA-256 plus byte length. Visual grouping is heuristic, and decoded comparisons may use only the first frame. Reports can contain filenames, relative paths and hashes, so inspect them before sharing.

Example workflow

  1. Choose a bounded group of images or a supported folder and run analysis.
  2. Separate exact matches from visual candidates; compare pairs and mark which findings you reviewed.
  3. Export CSV, JSON or HTML findings, then inspect file identifiers and path details before sharing the report.

Authored example: Use a fictional set containing two byte-identical images and one resized copy. Compare the exact group with the visual candidate and leave the review decision explicit; this is not a matching-accuracy benchmark.

Limits and handling: The tool does not delete, rename, move or upload files. Visual similarity is heuristic rather than a calibrated probability or identity guarantee. SHA-256 uses Web Crypto and requires a supported secure context; file and decoder limits apply.

Duplicate Image Finder questions

Will the finder delete or move the images it identifies?

No. It reports groups and review choices; it does not delete, rename or move files.

Are visual candidates guaranteed to be duplicates?

No. Perceptual matching is heuristic and needs your review; crops, rotations, edits and animation can affect results.

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