Word Diff for Sentence-Level Edits
Use Word diff for prose, headings, emails, and short paragraphs. Words, punctuation, newlines, and spacing runs can appear as changed tokens, making small inline edits easier to locate.
Free online tool - no registration or login
Free Text Diff Checker Online
Compare two text versions with word- or line-level additions and removals. Import local files, review the changes, and copy or download a TXT report without signing in.
- - Word and line comparison
- - Open supported plain-text files
- - Change counts and TXT report
- - Current-tab processing without autosave
Text comparison and supported file reading happen in this browser tab. Neither version is automatically saved or sent to an external diff service. Each side is limited to 200,000 characters.
How to Compare Two Texts Online
Move from two editable sources to a focused difference report that records the comparison settings you used.
Common Text Comparison Tasks
- Review edits between two document drafts
- Check changed values in a configuration snippet
- Verify added or removed lines in logs and generated output
- Step 1
Add the Original and Changed Versions
Paste, type, or open one supported plain-text file on each side. Keep the earlier version under Original and the version you want to review under Changed.
- Step 2
Choose the Comparison Detail
Use Word diff for sentence-level edits or Line diff for code-like and structured text. Ignore case or whitespace only when those differences are noise.
- Step 3
Review, Copy, or Download the Report
Read the labeled additions and removals with the active counts, then copy or download the readable TXT report for your review notes.
Choose Word or Line Comparison
The comparison granularity changes what the checker treats as one unit. Choose based on the structure you need to review, not on which mode produces fewer highlights.
Line Diff for Code, Lists, and Logs
Use Line diff when line boundaries carry meaning, such as in configuration snippets, logs, checklists, or source code. A modified line may appear as one removal followed by one addition.
Ignore Case or Whitespace Only When It Is Noise
Filters change which tokens or lines count as equal; they do not edit either source. Keep them off for passwords, identifiers, indentation-sensitive code, or any review where capitalization and spacing matter.
Read Additions, Removals, and Unchanged Text
Use direction labels, neutral context, and measured counts together. The result describes textual edits; it does not score writing quality or decide whether two passages mean the same thing.
Green Additions and Red Removals
Added content exists in the changed version and uses a green Added treatment. Removed content came from the original and uses a red Removed treatment. The visible labels and semantic markup repeat the meaning beyond color.
Confirm When Both Texts Are Identical
When no additions or removals remain, the result explicitly says whether the sources are exactly identical or have no differences under the active case and whitespace filters.
Use Counts as Review Evidence
Original and changed character counts show source size. Added, removed, and unchanged token or line counts show the comparison scope, but they are not a semantic similarity percentage.
Compare Drafts, Code, and Plain-Text Files
The checker works with any material that can be represented as plain text. It does not add syntax awareness or preserve rich-document formatting.
Review Document Revisions
Compare known versions of an article, email, policy, proposal, or contract clause to verify which wording was added, removed, or replaced. Important legal or editorial conclusions still need human review.
Check Configurations and Code Snippets
Find changed identifiers, values, punctuation, or complete lines in source and configuration snippets. The tool treats them as text and does not parse language syntax or validate the code.
Verify Lists, Logs, and Generated Output
Use Line diff to check missing list entries, reordered output, changed log lines, or differences between two generated responses when you already have both versions.
Browser Privacy and Text Diff Limits
Local processing reduces unnecessary data movement, but a focused plain-text checker still has practical boundaries that should guide what you paste and how you interpret the result.
Your Text Stays in the Current Browser Tab
The page compares typed, pasted, or locally opened text in the current tab and does not automatically persist or share it. Reloading or closing the tab can discard both versions.
Plain Text In, Plain Text Out
Word files, PDFs, images, tracked changes, comments, styles, and page layout are not compared. TXT export is a readable report, not a merged document, semantic analysis, or standards-compatible patch.
Large or Very Different Inputs May Stop Early
Each side is limited to 200,000 characters, and computationally expensive comparisons can stop before a result is produced. Your input remains available so you can shorten it or switch to Line diff.
Text Diff Checker FAQ
Answers about comparison modes, local text files, filters, report export, browser processing, and plain-text limits.
Is this text diff checker free to use?
Yes. You can compare text online free without registration or login. The page does not place word diff, line diff, local file reading, or TXT report export behind an account gate.
How do I compare two texts online?
Add the original text on the left and the changed version on the right. Choose Word diff or Line diff, decide whether case or whitespace should count, then review the labeled additions and removals. You can copy or download the resulting comparison report.
What is the difference between word diff and line diff?
Word diff compares word, punctuation, newline, and spacing tokens, so it is useful for sentence-level edits. Line diff treats each line as a unit, which is often clearer for code snippets, lists, configurations, and logs.
Can I compare two text files?
Yes. Open one supported plain-text file on each side, or mix file input with pasted text. The browser reads the files locally. Each side is limited to 200,000 characters, and rich or binary files such as Word documents and PDFs are not supported.
Can I ignore capitalization or whitespace changes?
Yes. Ignore case treats upper- and lowercase tokens as equal. Ignore whitespace ignores spacing tokens in Word diff and leading or trailing whitespace when matching lines in Line diff. These filters can hide meaningful changes, so leave them off when case or spacing matters.
What do the added and removed highlights mean?
Added text appears with a green Added treatment because it exists in the changed version. Removed text appears with a red Removed treatment because it existed in the original. Unchanged content remains neutral, and the legend repeats these meanings without relying on color alone.
Can I copy or download the comparison?
Yes. Copy or download a readable TXT report that records the active mode, filters, counts, and marked changes. It is a review report, not a merged document or a standards-compatible patch file.
Does the tool upload or save my text?
The comparison and supported file reading happen in the current browser tab and are not sent to an external diff service. The page does not automatically save drafts, so reloading or closing the tab can discard both versions.
Can this tool compare Word or PDF documents?
No. It compares plain text and does not preserve document formatting, comments, tracked changes, tables, images, or page layout. Extract the text first or use a format-aware document comparison tool when those features matter.
Is a text diff checker a plagiarism or semantic similarity checker?
No. This tool compares only the two versions you provide and reports token- or line-level edits. It does not search external sources, judge authorship, or decide whether differently worded passages have the same meaning.
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Open toolReady to compare two texts?
Add an original and changed version, choose the detail that matters, and save a readable report.