差异检查器
Compare two text inputs online and review additions, removals, unchanged lines, and comparison limits. 简体中文 locale.
Make HTML structure easier to inspect
This tool compares two text values and highlights lines or segments that differ. It helps review edits, configuration chan...
Formatting is not HTML validation
A diff checker aligns two inputs and labels inserted, removed, changed, or unchanged content. Results depend on line endin...
How to format HTML
- Paste the original and revised values, choose comparison options, run the check, and inspect both the summary and exact ch...
- Paste the original and revised values, choose comparison options, run the check, and inspect both the summary and exact ch...
Formatting method
- Read markup structure
The checker splits inputs into lines or tokens, computes an alignment, and renders additions, removals, and unchanged regi...
- Apply indentation
The checker splits inputs into lines or tokens, computes an alignment, and renders additions, removals, and unchanged regi...
- Preserve content
The checker splits inputs into lines or tokens, computes an alignment, and renders additions, removals, and unchanged regi...
Exact parser recovery, optional-tag handling, whitespace policy, embedded-language behavior, and error wording should be c...
Read the formatted result
A useful result makes the compared direction clear and preserves enough context to understand each change. Check invisible...
常见错误
Common mistakes include reversing old and new input, ignoring whitespace changes, comparing minified and formatted text, t...
Common mistakes include reversing old and new input, ignoring whitespace changes, comparing minified and formatted text, t...
限制和特殊情况
The checker cannot understand every programming language, prove behavior, resolve conflicts, detect all semantic changes, ...
The checker cannot understand every programming language, prove behavior, resolve conflicts, detect all semantic changes, ...
Examples
Diff Checker online — 1
What does a diff checker compare?
Paste the original and revised values, choose comparison options, run the check, and inspect both the summary and exact ch...
A useful result makes the compared direction clear and preserves enough context to understand each change. Check invisible...
Diff Checker online — 2
Does it understand code semantics?
Paste the original and revised values, choose comparison options, run the check, and inspect both the summary and exact ch...
A useful result makes the compared direction clear and preserves enough context to understand each change. Check invisible...
Diff Checker online — 3
Why do line endings create changes?
Paste the original and revised values, choose comparison options, run the check, and inspect both the summary and exact ch...
A useful result makes the compared direction clear and preserves enough context to understand each change. Check invisible...
Diff Checker online — 4
Can it ignore whitespace?
Paste the original and revised values, choose comparison options, run the check, and inspect both the summary and exact ch...
A useful result makes the compared direction clear and preserves enough context to understand each change. Check invisible...
Diff Checker online — 5
Does order matter?
Paste the original and revised values, choose comparison options, run the check, and inspect both the summary and exact ch...
A useful result makes the compared direction clear and preserves enough context to understand each change. Check invisible...
Diff Checker online — 6
Can I compare JSON?
Paste the original and revised values, choose comparison options, run the check, and inspect both the summary and exact ch...
A useful result makes the compared direction clear and preserves enough context to understand each change. Check invisible...
Frequently asked questions
What does a diff checker compare?
A diff shows textual differences under selected rules. Combine it with parsers, tests, domain checks, and review of the ac...
Does it understand code semantics?
A diff shows textual differences under selected rules. Combine it with parsers, tests, domain checks, and review of the ac...
Why do line endings create changes?
A diff shows textual differences under selected rules. Combine it with parsers, tests, domain checks, and review of the ac...
Can it ignore whitespace?
A diff shows textual differences under selected rules. Combine it with parsers, tests, domain checks, and review of the ac...
Does order matter?
A diff shows textual differences under selected rules. Combine it with parsers, tests, domain checks, and review of the ac...
Can I compare JSON?
A diff shows textual differences under selected rules. Combine it with parsers, tests, domain checks, and review of the ac...
Is a clean diff proof of safety?
A diff shows textual differences under selected rules. Combine it with parsers, tests, domain checks, and review of the ac...
How should I review a diff?
A diff shows textual differences under selected rules. Combine it with parsers, tests, domain checks, and review of the ac...