Compare Two Texts Online (Text Diff)
Find the differences between two text snippets, articles, or code files. Highlights additions, deletions, and modifications with clean visual comparison.
Compare Text Online (Diff Checker)
The Compare Text tool lets you quickly identify similarities and differences between two versions of any text, code file, document, or contract draft. It runs a line-by-line comparison algorithm right inside your browser, color-coding added lines in green with a + sign and deleted lines in red with a - sign.
Because all comparisons are computed on your device via client-side JavaScript, your text never leaves your browser. You can safely compare sensitive legal agreements, personal correspondence, confidential code repositories, and private notes with total security.
Key Features & Comparison Modes
- Side-by-Side (Split) View: Displays the original and modified texts in two synchronized vertical panels, making it effortless to see corresponding changes line by line.
- Inline (Unified) View: Merges both versions into a single chronological stream, ideal for reading modified paragraphs or reviewing code changes in standard patch format.
- Ignore Case: Disregards letter capitalization differences (such as "Database" vs "database") so you can concentrate purely on content modifications.
- Ignore Whitespace: Filters out invisible formatting discrepancies, such as spaces vs tabs, indentation shifts, and trailing spaces.
- Swap Sides: Instantly inverts the comparison direction, turning additions into deletions and vice versa.
When to Use an Online Diff Checker
- Proofreading & Editorial Revisions: Compare your initial draft against an edited version to spot editorial rewrites, removed sentences, and typos.
- Software Development & Code Review: Check snippets of JSON, SQL queries, HTML markup, configuration files, and scripts before deploying them.
- Legal Contracts & Agreements: Verify that an updated contract or Terms of Service document does not contain hidden changes or omitted clauses.
- Data & List Auditing: Spot missing or modified entries between two database dumps, email lists, or CSV spreadsheets.
Related Text Tools
Pair the diff checker with our other helpful text utilities:
- Remove Duplicate Lines — strip out repeated rows and find unique entries in your lists.
- Sort Text Lines — reorder lines alphabetically or naturally before running comparisons.
- Clean Whitespace — strip accidental indentation, spaces, and line breaks.
- Text Analyzer & Readability — calculate reading levels and complexity scores for your content.
- Character Counter — measure character counts, word totals, and estimated reading time.
- Find and Replace — search and replace keywords or regular expressions across your documents.