Text Comparison
Two drafts of the same text rarely differ in only one place, so this page lets you choose how finely to look: whole lines for code and logs, words for a rephrased sentence, single characters when you are hunting a typo. The change count arrives before you read a word of it, so a one-letter edit and a rewritten section are easy to tell apart.
Import from URL Load plain-text pages directly when the site allows cross-origin access. If blocked, use Open File or paste instead.
Diff Results
Original (removed)
Modified (added)
Questions fréquentes sur les calculateurs en ligne
Which diff granularity should I pick?
Lines for source code, logs and anything where a whole row appeared or disappeared; words when a sentence was rephrased; characters when you are checking a single letter, a stray space or one edited number.
Can it tell me how much changed, not just where?
Yes. The summary counts the changes and splits them into additions and deletions, which is what separates a touched comma from a rewritten passage.
Will my original file be changed?
The result is downloaded as a separate file. Keep your original until you have checked the Line, word and character diff.
What should I check before using the result?
Open the Line, word and character diff in the application that consumes it and spot-check the parts that matter to you; the original file stays untouched if you need to re-run with different options.
Is text comparison processed on a remote server?
No. All processing runs in your browser, so nothing is saved on our servers unless you choose to copy results elsewhere.
Can I find the difference between two text files side by side?
Yes. Paste or upload original and modified text, click Compare, and review color-highlighted additions and deletions in the diff panel.
What Is Text Comparison?
Text compare finds line-level vs character-level changes between two drafts. Writers use it for revisions; developers use it as a quick online diff checker when an IDE is not open.
When you need to spot changes quickly, a side-by-side diff beats manual scrolling. Paste content into both panels or upload TXT, LOG, source code, and pasted plain text, then review highlighted additions, deletions, and edits in one view.
Also known as a text diff tool, compare text online, document difference checker, this page is built for developers, writers, analysts, and QA teams who need accurate diffs without installing desktop software. Processing runs locally in your browser whenever the format allows, which keeps sensitive data off third-party servers.
How to Use Text Comparison Online
- Open the tool — No registration is required.
- Add the original — Paste or upload the first version in the left panel. Supported inputs include TXT, LOG, source code, and pasted plain text.
- Add the modified version — Paste or upload the second version in the right panel.
- Choose options — Use the case, whitespace, formatting, key-order, or format-specific settings shown on this page when available.
- Review the diff — Inspect highlighted changes in the results area.
- Copy or export — Save the comparison output for tickets, pull requests, or audit logs.
Tip: If this page offers sample data, load it first to see how the comparison behaves before working with your own files.
Text Diff Modes
- Line-level vs character — Line diffs are best for code and logs; character highlights help editorial prose.
- Whitespace — Ignore whitespace when comparing reformatted drafts; keep it on for code.
- Case sensitivity — Turn off for copy edits; keep on for identifiers and URLs.
Key Features of Text Comparison
- Side-by-side diff — Clear view of line-by-line and character-level text changes with color-coded additions and deletions.
- Multiple input methods — Paste text, upload files, and swap panels where supported.
- Format-aware — Handles TXT, LOG, source code, and pasted plain text with sensible defaults.
- Privacy-first — Browser-side processing; no server upload for supported formats.
- Free and unlimited — No account, watermark, or export cap for normal use.
- Cross-platform — Works on Chrome, Firefox, Safari, and Edge on desktop and mobile.
- No installation — Web-based diff checker; open the page and compare immediately.
Zero Data Retention — Compare Securely in Your Browser
FileCompare.org runs supported comparisons in your browser: your files and pasted text stay on your device. Nothing is uploaded, stored, or logged on our servers for browser-side formats.
That matters when you diff contracts, API keys, customer data, or unreleased code. You get instant side-by-side results without sending content over the network.
Common Use Cases
Teams choose an online diff when they need line-by-line and character-level text changes without a heavy IDE or desktop suite. Typical scenarios include:
- Legal and editorial document review
- Copywriting revision tracking
- Plain-text log comparison
- Manuscript and article diffs
Because the tool is web-based, remote collaborators can share the same workflow from any location—useful for agencies, open-source maintainers, and distributed QA teams.
Tips for Best Results
Use line-level vs character highlights deliberately: lines for code/logs, characters for prose. Toggle ignore-whitespace for reformatted drafts.
When a portal or pipeline rejects your file, compare its encoding, line endings, and size limits with your source, adjust settings, and run the diff again.
Bookmark this page for repeat jobs—controls stay visible between uploads, which speeds up daily review cycles.
Related Workflows
If you are checking text comparison for writers, code diff online free, side-by-side text diff, this text comparison page keeps the comparison focused on the relevant format and workflow. Use the related tools in the navigation when the input changes from text to structured data, lists, documents, or images.