Diff Checker
Compare two text or code snippets side-by-side to highlight added, removed, and modified lines instantly. · Updated
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
| Option | Description |
|---|---|
| Comparison granularity | Select whether differences are calculated line-by-line or with word/character precision. |
| Output format | Visual line markers or a git-style unified diff. For apply and create workflows, see Unified Patch. |
| Ignore leading/trailing whitespace | Ignores differences in indentation or trailing spaces when comparing lines. |
FAQ
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.
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.