Compare Text & Code in Seconds
Find differences between two texts instantly with syntax highlighting. No uploads, unlimited comparisons, 100% free and secure.
Rate this tool
(0)
Original Text
Modified Text
Why Choose Filator's Text Diff Checker?
Syntax Highlighting
Compare code with color-coded syntax highlighting for 20+ languages including JavaScript, Python, Java, C++, HTML, CSS, JSON, and more.
100% Private & Secure
Your text never leaves your browser. All processing happens locally using JavaScript—no server uploads, complete privacy.
No File Size Limits
Compare files of any size—limited only by your device's memory. Easily handles several MB files with instant processing.
How to Compare Text Online for Free
Filator's free text diff checker lets you compare text and code files instantly in your browser with syntax highlighting for 20+ languages—no file uploads, no server processing, no signup required. Unlike Diffchecker (desktop app for privacy), Text-Compare.com (server uploads), and TripleTen (10MB limit), Filator processes everything locally on your device for complete privacy with unlimited comparisons.
How to Compare Text Step-by-Step
- 1.Paste your original text in the left editor or upload a .txt file (supports syntax highlighting for 20+ languages)
- 2.Paste your modified text in the right editor or upload a second .txt file
- 3.Select comparison mode: lines (best for code), words (best for documents), or characters (find tiny changes)
- 4.Choose view: split view (side-by-side) or unified view (git-style diff)
- 5.Optionally enable "Ignore Case" or "Ignore Whitespace" for focused comparisons
- 6.Review highlighted differences (additions in green, deletions in red) with similarity percentage
- 7.Download diff report if needed—includes all changes and statistics
Filator vs Competitors Comparison
| Feature | Filator | Diffchecker | Text-Compare.com | TripleTen |
|---|---|---|---|---|
| File Processing | Client-side | Desktop only | Server upload | Client-side |
| File Size Limit | Unlimited | Unspecified | Unspecified | 10MB |
| Syntax Highlighting | 20+ languages | Yes | No | 20+ languages |
| Registration | Never required | Optional | Not required | Not required |
| Works Offline | Yes (PWA) | Desktop app | No | No |
| Comparison Modes | Line/Word/Char | Word/Character | Line only | Multiple |
Advanced Features
- • Syntax Highlighting: Color-coded syntax for 20+ programming languages (JavaScript, Python, Java, C++, HTML, CSS, JSON, XML, SQL, PHP, Ruby, Go, Rust, TypeScript, and more)
- • Multiple Comparison Modes: Line-by-line (best for code), word-by-word (ideal for documents), or character-by-character (find tiny changes)
- • Dual View Options: Side-by-side split view for easy comparison or unified diff view for git-style output
- • Ignore Options: Toggle "Ignore Case" and "Ignore Whitespace" to focus on meaningful content changes
- • File Upload: Upload .txt files directly instead of copy-pasting large texts
- • Export Diff Report: Download detailed comparison report with all changes and statistics
- • Similarity Percentage: See exactly how similar or different your texts are with numerical metrics
- • Lightning Fast: Instant comparison using optimized diff algorithms—no server queues or upload waits
Common Use Cases
Code Review & Development
Compare code versions before/after changes, review pull requests, analyze git diffs, check configuration files, and debug with log comparisons
Document Editing
Track document revisions, compare contract versions, proofread content edits, verify translations, and review academic paper changes
Legal & Compliance
Compare contract drafts, verify legal document changes, track policy updates, and ensure compliance with exact change tracking
Content Management
Compare blog post versions, track website content changes, verify API responses, and review database schema modifications
Frequently Asked Questions
How do I compare text online for free?
Paste your original text in the left editor and modified text in the right editor (or upload .txt files). Select your preferred comparison mode (lines, words, or characters), choose split or unified view, then review the highlighted differences. Download the diff report if needed—all instantly with no signup.
Is the text diff checker really secure?
Yes, absolutely. Unlike competitors that send text to their servers (Diffchecker Desktop required for privacy, Text-Compare.com server processing), Filator processes everything in your browser using JavaScript. Your text never leaves your device, ensuring complete privacy. There's zero server upload risk.
What file size can I compare?
There's no hard file size limit—processing happens in your browser, so it depends on your device's memory. Filator handles files up to several MB easily, compared to competitors like TripleTen (10MB cap) and server-dependent tools with strict upload limits.
Does syntax highlighting work for all programming languages?
Yes! Our diff checker supports syntax highlighting for 20+ languages including JavaScript, Python, Java, C++, HTML, CSS, JSON, XML, SQL, and more. This makes code comparison much clearer than plain text diff tools.
Can I compare code files without uploading to a server?
Yes! Filator is one of the few diff checkers that processes files 100% client-side in your browser. Your code never leaves your device, unlike Text-Compare.com and others which require server uploads for processing.
Is registration required to use the diff checker?
No account creation or signup is ever required. Unlike some competitors who push registration for premium features, Filator is completely free and anonymous forever with unlimited comparisons.
Can I use this on mobile devices?
Yes, our text diff checker works perfectly on all modern mobile browsers including Safari on iOS and Chrome on Android. It's also available as a PWA (Progressive Web App) for offline use.
What's the difference between line, word, and character modes?
Line mode compares entire lines (best for code and structured text). Word mode compares individual words (ideal for prose and documents). Character mode compares every character (perfect for finding tiny changes like typos).
Ready to Compare Your Text?
Start comparing text and code instantly with syntax highlighting for 20+ languages, no signup, unlimited comparisons, and complete privacy. Fast, secure, and completely free—with none of the limitations you'll find on Diffchecker, Text-Compare, or TripleTen. Try Filator now and experience truly unlimited text comparison.