Compare Two Texts Side by Side
Paste your two texts and see exactly what changed. Every addition, deletion, and modification is highlighted instantly — no data leaves your browser.
This page is part of the main Compare Text tool — the same engine, the same options.
No comparison yet. Paste or upload text in both fields below — results appear here automatically, and nothing is calculated until you do.
Compare your two texts
Original Text (A)0 words
Modified Text (B)0 words
Why Side-by-Side Text Comparison Works Best
Side-by-side text comparison is the gold standard for reviewing changes. By placing the original and modified versions next to each other, you maintain full context while spotting every edit. No scrolling back and forth, no second-guessing — just clear, visual differences.
SnapTextCompare also offers a unified diff view for those who prefer a single-column format — the same view developers use in Git. Switch between split and unified views with one click, depending on your workflow.
Whether you're comparing two paragraphs of marketing copy, two versions of a legal clause, or two code functions, the side-by-side layout lets you scan differences at a glance. Additions appear in green, deletions in red, and unchanged text flows naturally between them.
How to Compare Two Texts
Step 1: Paste the original text in the left panel — or drag and drop a file (TXT, PDF, DOCX).
Step 2: Paste the modified text in the right panel.
Step 3: Differences are highlighted instantly. Green means added, red means removed.
Step 4: Fine-tune with options: toggle case sensitivity, ignore whitespace, or switch between word and line comparison.
Step 5: Export your results or copy the comparison to share.
Who Compares Two Texts?
Beginners and non-technical users: If you've never used a diff tool before, paste-and-compare is the easiest way to check what changed. No software to install, no learning curve.
Writers and bloggers: Compare draft versions of articles, blog posts, or marketing copy. See every edit your co-author or editor made.
Teachers and students: Compare submitted versions of assignments, or track how an essay improved between drafts.
Business teams: Verify that the "final" version of a proposal, email template, or policy document matches the approved version.
Related comparison tools
How SnapTextCompare works
Diff engine
Google's diff-match-patch (Apache 2.0), running in your browser. Character mode diffs raw characters; word and line modes encode tokens or lines first and diff those, then decode the result.
Similarity & importance
Similarity = 1 − Levenshtein / max(len). Importance weighs each change by category — money and dates score 90+, punctuation scores 3. Deterministic on any device.
Privacy
Files are read with the HTML5 File API and processed in your browser. No network request is ever made with your content — verifiable in the Network tab of your browser's DevTools.
PDF extraction uses pdf.js (Mozilla). Word extraction uses mammoth.js. UTF-8 with or without BOM is auto-detected; CRLF line endings are normalised to LF before diffing so cross-OS files don't appear entirely changed.
Helpful Reading
How to Compare Two Texts Online
A practical walkthrough for comparing any two texts online.
How to Compare Text Without Coding
A beginner-friendly guide — no technical knowledge needed.
Word vs Line Comparison
When to use word-by-word vs line-by-line comparison.
Compare Two Text Files Online
Upload and compare files directly in your browser.
Compare Two Texts FAQ
Common questions about side-by-side text comparison.