Compare Text, JSON, Images & AI Edits
Privacy-first comparison tools. All processing happens in your browser.
Image Diff
Compare images with visual modes
Text Diff
Line, word & character diff
JSON Diff
Validate & compare JSON
Before/After
Interactive image slider
Why Use CompareDiff.tech?
Privacy First
Your text, JSON, and images are processed locally in your browser. No uploads, no server storage, no data collection.
Instant Results
No waiting for uploads or server processing. Compare files instantly with line-by-line, pixel-by-pixel, or key-by-key comparisons.
Multiple Formats
Compare text documents, JSON API responses, images, screenshots, and AI-generated content all in one place.
Common Use Cases
For Developers
- • Compare code changes before and after refactoring
- • Validate JSON API responses across environments
- • Check configuration file differences
- • Review text-based diff output
For Designers & QA
- • Visual regression testing for UI changes
- • Compare design mockups with implemented UI
- • Check screenshot differences across browsers
- • Validate pixel-perfect implementations
For Content Creators
- • Compare AI-generated image variations
- • Show before/after photo editing results
- • Track document revisions and changes
- • Compare different AI model outputs
For Teams
- • Review pull request changes visually
- • Compare staging vs production outputs
- • Validate data migrations and transformations
- • Share visual comparison results
How It Works
- 1
Choose Your Tool
Select the comparison type you need: text, JSON, images, or before/after slider.
- 2
Upload or Paste Content
Paste text directly, upload images, or input JSON. Everything stays in your browser.
- 3
Get Instant Results
See highlighted differences, visual overlays, or side-by-side comparisons immediately.
- 4
Download or Share
Copy results, download difference maps, or export comparison images.
Frequently Asked Questions
Is my data uploaded to your servers?
No. All comparison tools in this MVP process your content locally in your browser using JavaScript. Your files never leave your device.
What file formats are supported?
Text Diff accepts any plain text. JSON Diff validates JSON objects. Image tools support PNG, JPG, JPEG, and WebP up to 5 MB.
Do I need to create an account?
No account needed. All tools are immediately available without registration or login.
Can I use this for sensitive documents?
Yes. Since processing happens locally in your browser, your sensitive content is not transmitted to any server.