Text Diff Checker
Compare two versions of text and see what changed
Texts are too large to compare efficiently — try smaller inputs.
Text Diff Checker — Complete Guide & Instructions
MakeCard Text Diff Checker compares an original and a changed version of any text and highlights exactly which lines were added, removed, or left untouched. Paste both versions, press Compare, and get a colour-coded line diff with counts of added, removed, and unchanged lines. It is ideal for proofreading edits, reviewing contract or code changes, and spotting quiet modifications between two drafts.
How to Use Text Diff Checker
- 1 Paste the first version into Original text.
- 2 Paste the second version into Changed text.
- 3 Press Compare.
- 4 Scan the result — lines marked + are added, − are removed; the badges above show the counts.
Key Features & Capabilities
- Line-by-line comparison with + / − markers for added and removed lines.
- Colour-coded rows — green for additions, red for removals, plain for unchanged.
- Summary badges counting added, removed, and unchanged lines at a glance.
- Monospaced output preserves spacing for code and structured text.
- Scrollable result pane keeps long documents readable.
- Size guard warns when inputs are too large to compare efficiently.
Supported Formats & Specifications
| Parameter | Specification |
|---|---|
| Comparison unit | Whole lines (added / removed / unchanged) |
| Input | Two pasted text blocks — any language or code |
| Output | Inline unified diff with per-line markers and counts |
Practical Everyday Use Cases
- Comparing two versions of an essay, article, or assignment before submission.
- Reviewing what changed between contract or quotation drafts.
- Spotting edits in configuration files or code snippets.
- Checking whether a translated document kept all original lines.
Pro Tips for Best Results
- This is a line-level diff — two different words on the same line appear as one removed plus one added line.
- Remove trailing blank lines first for cleaner added/removed counts.
- For very large files, compare section by section if the size warning appears.
Common Problems & Solutions
If one paste came from a different editor, line endings or extra blank lines may differ — trim both inputs and compare again.
Very long texts are expensive to diff line by line — split the document into smaller chunks and compare each part.
Privacy & Security
100% Client-Side Execution
Both texts are compared on your device only — drafts, contracts, and code are never uploaded or stored.
Frequently Asked Questions
Everything you need to know about using Text Diff Checker
Paste the original in the first box and the new version in the second, then press Compare — added and removed lines are highlighted instantly.
It compares whole lines: a line present only in the new version shows as added (+), one missing from it shows as removed (−).
Yes — the monospaced output preserves indentation, making it useful for spotting changes in code, config files, or data.
They count the result: green shows lines added, red shows lines removed, and grey shows lines that stayed the same.
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100% free, browser-based, and private. No installation, registration, or file upload to external servers required.
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