Text Compare & Diff Checker
Compare two text drafts side by side with high-accuracy word and character diffs.
Type or paste text into both panels above to see visual differences.
When to Use a Text Diff Tool
Editorial & Proofreading Revisions
Compare first drafts against editor revisions to instantly see what sentences were rewritten, what phrases were trimmed, and what new arguments were added.
Legal Contracts & Agreements
Review updated contract versions to spot subtle clause alterations, altered numbers, or deleted obligations before signing.
Code & Markdown Documentation
Quickly compare JSON files, CSS snippets, Markdown articles, or config files without having to open a terminal git diff.
Key Capabilities of Text Compare (Diff)
Word, Character & Line Diff
Toggle between granular word-by-word diffing, line-by-line comparison, or exact character-level edits.
Split & Unified Views
Inspect changes side-by-side or merge them into a unified chronological stream with green/red highlights.
Similarity Percentage
Automatically computes a mathematical similarity index showing exactly how much of your text was altered.
Swap & One-Click Tools
Instantly swap Original and Modified texts, load sample revisions, and export detailed diff summaries.
How to Compare Two Texts for Differences: Editorial, Legal & Document Diff Guide
How automated diff tools catch contract discrepancies and streamline editorial proofreading audits.
Got Questions? We Have Answers
How does the Text Compare tool detect changes?
The tool uses a client-side Longest Common Subsequence (LCS) diff algorithm to compare two texts. It identifies exact additions, deletions, and modified text segments at the word, character, or line level.
What is the difference between Side-by-Side and Unified view?
Side-by-Side view places both versions next to each other in two synchronous columns with highlighted differences. Unified view blends changes into a single readable stream, displaying deletions in red strikethrough and additions in green.
Is my confidential text private when comparing documents?
Yes. 100% of the diff calculation occurs locally in your browser session. Neither document is ever uploaded to a server or stored.
Can I compare code or markdown drafts?
Yes! You can compare essays, blog post edits, code snippets, contracts, or legal agreements by switching the comparison level to "Line by Line" or "Word by Word".
Can I export a comparison report?
Yes, click the "Copy Report" button to copy a clean text summary of all additions, deletions, and percentage similarity.
Explore All 14 Free Writing Tools
A complete, interconnected suite of privacy-first text analysis, counting, and editing utilities.
Counting Tools
5Writing and text analysis tool.
Count characters with & without spaces for Twitter/X, Instagram, and SMS.
Detects sentence counts, longest/shortest sentences & pacing.
Paragraph statistics, line breaks, double-spacing & blank line cleaner.
Two-way calculator with APA, MLA, Chicago, font & spacing presets.
Analysis & SEO
4Flesch Reading Ease and grade-level scoring with actionable text tips.
Analyze 1, 2, and 3-word keyword frequency and percentage density.
Catch overused crutch words, measure lexical diversity, and polish drafts.
Master platform character limits, optimal length benchmarks, and mobile cutoffs.
Editing Utilities
5Generate random words, sentences, and creative prompts with filters.
Switch between Sentence case, Title Case, UPPERCASE, and lowercase in one click.
How automated diff tools catch contract discrepancies and editorial revisions.
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How to clean repeated words from sentences, tags, CSV lists, and spreadsheet columns.