Diff Checker & Text Comparator
Compare two text or code snippets side-by-side to highlight added, removed, and modified lines instantly.
Batch workspace
Format multiple files locally in one run.
How to use the Diff Checker
Paste code or file
Paste your raw TEXT text or upload directly.
Configure options
Choose indentation, dialect, or formatting preferences.
Format & export
Click format, then copy, download, or inspect in tree view.
What is a Diff Checker?
Compare two text or code snippets side-by-side to highlight added, removed, and modified lines instantly. This tool re-indents and organizes code according to standard style conventions while checking for syntax validity. Everything executes 100% inside your browser, guaranteeing zero latency and complete privacy for API keys, user tokens, and confidential database schemas.
A visual diff is the fastest way to review config drift and refactors. This checker stays in-browser so proprietary code never reaches a third-party pastebin.
Common errors and fixes
Both sides are empty
Paste original text on the left and modified text on the right before comparing.
Diff looks noisy
Try word- or line-level mode depending on whether you care about whitespace or structure.
Huge files freeze the tab
Prefer smaller excerpts for interactive diffs; multi-megabyte comparisons belong in a local git diff.
Line endings differ
Normalize CRLF vs LF offline if the only changes are carriage returns.
Options Explained
| Option | Description |
|---|---|
| Comparison granularity | Select whether differences are calculated line-by-line or with word/character precision. |
| Ignore leading/trailing whitespace | Ignores differences in indentation or trailing spaces when comparing lines. |
Frequently Asked Questions
How do I compare two different text snippets?
Separate your original text and modified text with '=== MODIFIED ===' in the input box, or paste directly into the tool.
Does this diff checker support word-level and character-level comparisons?
Yes. Select 'Word by word' or 'Character by character' in the options panel.
Is my proprietary code uploaded to any external server?
No. All diff comparisons execute 100% locally in your browser memory.
Can I ignore spaces and indentation differences?
Yes. Check 'Ignore leading/trailing whitespace' in the options panel.
What do the '+' and '-' symbols mean?
Lines starting with '+' represent added lines in the modified version, while lines with '-' represent deleted lines.