The Ultimate Online
Comparison Tool
Compare Text, PDFs, Word Documents, and Images securely in your browser. Detect differences instantly with 100% privacy and zero data storage.
Why Choose Our Diff Checker?
Everything you need to analyze differences in code, contracts, and designs.
Text & Code Compare
Paste code snippets or text blocks to see character, word, or line-level differences. Ideal for developers debugging code or writers tracking edits.
Document Analysis
Upload PDF or DOCX files to extract and compare contents. Our smart parser ignores formatting noise to focus on the actual content changes.
Visual Image Diff
Pixel-perfect image comparison with heatmaps and similarity scores. Perfect for UI/UX designers validating implementation against designs.
Secure, Fast, and Private by Design
We built this tool because we believe privacy shouldn't be a premium feature. Whether you are comparing sensitive legal contracts or proprietary source code, you can trust that your data never leaves the volatile memory of our processing server.
- In-Memory Processing Only (No DB storage)
- Automatic File Deletion after request
- SSL/TLS Encrypted Transfers
- No Sign-up Required
100% Secure
Ephemeral processing ensures no data persistence.
Lightning Fast
Optimized algorithms for instant results.
Who Uses Toolkik?
Developers & Engineers
Quickly check diffs between code versions without needing a complex IDE setup. Useful for quick PR reviews or checking config file changes.
Legal & Business Professionals
Compare different versions of contracts, terms of service, or agreements to ensure no unauthorized changes were inserted.
Content Writers & Editors
Track changes between drafts, find subtle edits in articles, and ensure consistency across large documents.
How to Compare Files Online
Upload / Paste
Select the "Text" or "Files" tab and input your source material.
Process
Click "Compare". Our engine parses and analyzes contents in milliseconds.
Analyze
View the highlighted differences and similarity score instantly.
Frequently Asked Questions
Is my data secure?
Absolutely. We use a strictly volatile memory-only process. Your uploaded files and text are processed in RAM and immediately discarded. Nothing is written to the disk.
What file formats are supported?
For document comparison, we support PDF, DOCX (Word), and TXT files. For images, we support JPG, PNG, and WEBP.
Is this tool free?
Yes, Toolkik is completely free to use for all text, file, and image comparison features. No credit card required.
Can I compare images?
Yes! Navigate to the Image Comparison page to use our visual diffing tool.