the image app icontheimgappWorkspaceNew
  • Compress
  • Upscale
  • Progressive JPEG
  • Target Size
  • Lossless Optimize
  • Quantize Colors
  • Resize
  • Crop
  • Rotate
  • Flip
  • Round Corners
  • Add Border
  • Trim
  • Split Image
  • Aspect Ratio Crop
  • Tilt / Skew
  • Convert
  • SVG to PNG
  • HEIC to JPG
  • Image to Base64
  • PDF to Image
  • Image to PDF
  • GIF to Frames
  • Frames to GIF
  • GIF to MP4
  • Image to ICO
  • Filters
  • Watermark
  • Meme Generator
  • Image Overlay
  • Auto Enhance
  • Noise Reduction
  • Color Adjust
  • Vignette
  • Pixelate
  • Background Color
  • Collage
  • Sprite Sheet
  • Favicon Generator
  • Device Mockup
  • Photo Grid
  • Stack / Concat
  • Social Resize
  • Placeholder
  • Profile Picture
  • OG Image
  • Story Template
  • Metadata
  • Color Palette
  • Histogram
  • Compare
  • Similarity Check
  • File Type Detect
  • Dimensions List
  • Bulk Rename
  • Screenshot Beautify
  • QR Code
  • Image to ASCII
  • Long Screenshot
  • Video Trim
  • Paste & Download
  • Extract Image

Free image processing tools

K
DocsBlogFeedback
theimgapp logotheimgapp

Free, privacy-first online image tools. Compress, convert, resize, crop, and edit images directly in your browser. No uploads, no signup, no watermarks.

PRODUCT

  • All tools
  • Compression tools
  • Converter tools
  • Resize tools
  • Social media tools

LEARN

  • Blog
  • Documentation
  • FAQ
  • Image formats
  • API reference

COMPANY

  • About
  • Contact

LEGAL

  • Privacy
  • Terms of Service
  • Disclaimer & Cookies

© 2026 theimgapp. All rights reserved.

Files are processed in your browser whenever possible. We never store your images.

  1. Home
  2. ›Tools
  3. ›Image Similarity Checker Online

Image Similarity Checker Online

Compare two images for visual similarity percentage. Free online tool — no signup required.

Similarity Check

Compare two images for visual similarity using perceptual comparison.

Drop two images here

or click to browse · upload 2 images to compare

What This Tool Does

Upload two images and get a visual similarity score. Useful for detecting duplicates, verifying image processing results, or checking how much an image has changed after editing.

How to Use

  1. 1Open theimgapp.com/tools/similarity in any browser
  2. 2Upload your images by dragging and dropping or clicking to browse
  3. 3Adjust the settings as needed
  4. 4Download your processed images individually or as a ZIP file

Privacy First — No Uploads

Your images are processed entirely in your browser. They are never uploaded to any server. Once you close the tab, all data is gone. No tracking, no storage, no cookies for your files.

Related Tools

C

Compare

Side-by-side image comparison

M

Metadata

View or strip EXIF data

F

File Type Detect

Detect actual image format from file bytes