How do I compare two text versions?

Paste the original text on the left, paste the revised text on the right, choose a diff mode, and review the result.

What is the difference between side-by-side diff and unified diff?

Side-by-side diff places original and revised text next to each other. Unified diff shows changes in one compact stream.

What is line diff used for?

Line diff is useful for paragraphs, lists, logs, CSV rows, code snippets, and config files.

What is word diff used for?

Word diff is useful for proofreading, article edits, descriptions, emails, and sentence-level wording changes.

When should I use character diff?

Character diff is best for short strings, IDs, typos, hashes, filenames, and exact text checks.

Can I ignore whitespace differences?

Yes. Enable ignore whitespace to hide spacing-only changes during comparison.

Can I compare code or config files?

Yes. Line diff is usually the clearest mode for code, logs, JSON, YAML, CSV, and config snippets.

Does this tool upload my text?

No. The comparison runs locally in your browser.

Can I copy the diff summary?

Yes. Use the copy summary button to copy counts, selected settings, and a compact diff report.

Text Diff Checker | BlinkCalc.

Original text

Revised text

Diff mode

Result view

Line diff is best for structure. Word diff is best for proofreading. Character diff is best for exact short strings.

Total differences

8

Added and removed units combined.

Added

4

Units found only in revised text.

Removed

4

Units found only in original text.

Changed pairs

1

Removed and added rows paired for review.

Original lines

4

Revised lines

4

Diff mode

line

Result view

side by-side

Diff Results

Review added, removed, changed, and unchanged content below.

AddedRemovedChangedUnchanged

removed#1

BlinkCalc is a fast online calculator website.

revised#–

removed#2

It includes finance tools, unit converters, and text utilities.

revised#–

removed#3

The design is clean and simple.

revised#–

changed#4

All tools should be easy to use on mobile.

changed#1

BlinkCalc is a fast online calculator platform.

original#–

added#2

It includes finance tools, unit converters, text utilities, and data tools.

original#–

added#3

The design is clean, simple, and modern.

original#–

added#4

All tools should be easy to use on phones and tablets.

Local comparison

Your pasted text is compared in the browser without backend upload.

Multiple diff modes

Choose line, word, character, or sentence comparison depending on the job.

Copyable summary

Copy a concise diff report for review notes, QA, documentation, or tickets.

Dynamic Diff Insights

Found 4 added, 4 removed, and 1 changed section.

Whitespace differences are currently included unless only trailing spaces are trimmed.

Line diff is best for lists, logs, config files, code snippets, and paragraph-level review.

Side-by-side view helps compare the original and revised versions visually.

Enabled normalization: normalize line endings, trim trailing spaces.

For short text, word and character diff can reveal small edits clearly.

How Text Diff Checking Works

Text diff checking compares two versions of text.

The tool breaks text into lines, words, characters, or approximate sentences.

Each part is marked as added, removed, changed, or unchanged.

Normalization options can hide differences that do not matter for the task.

Side-by-side views help visual review, while unified views are compact and copy-friendly.

Side-by-Side Diff vs Unified Diff

Side-by-side diff

Places original and revised versions next to each other. Useful for proofreading and review.

Unified diff

Shows changes in one compact stream. Useful for summaries, code reviews, and reports.

Line, Word, Character, and Sentence Diff Explained

Line diff

Best for paragraphs, lists, logs, CSV rows, code, and config files.

Word diff

Best for article edits, emails, descriptions, and proofreading.

Character diff

Best for typos, IDs, filenames, hashes, and exact short strings.

Sentence diff

Approximate mode for comparing longer rewritten prose sections.

Whitespace, Case, Punctuation, and Line-Ending Notes

Whitespace differences can be important in code but noisy in prose.

Case-sensitive comparison treats Apple and apple as different.

Punctuation can matter in contracts, code, CSV, and exact copy.

Ignoring punctuation is useful for casual text but risky for technical text.

Windows, macOS, and Linux can use different line endings.

Normalization affects comparison rules, not the original displayed text.

Common Text Diff Examples

Compare two paragraphs for wording changes

Compare original and revised blog copy

Compare two lists to find missing items

Compare code snippets line by line

Compare config files with ignored whitespace

Compare product descriptions

Compare log outputs

Compare exact strings with character diff

Writing, Coding, and Review Use Cases

Proofreading drafts

Reviewing rewritten copy

Comparing document versions

Checking email edits

Comparing product descriptions

Reviewing code snippets

Comparing config files

Checking CSV or log differences

Finding missing list items

Reviewing translations or rewrites

Privacy and Local Processing Notes

Pasted text is processed locally in the browser.

No account is required.

No backend storage is added by this page.

Text is not sent to a server.

Avoid pasting sensitive confidential content unless necessary.

This tool is intended for lightweight comparison, proofreading, and debugging.

Method Explanation

1. Paste the original text and revised text.
2. Choose line, word, character, or sentence diff mode.
3. Select optional normalization rules.
4. Split both inputs into comparable units.
5. Compare the original and revised sequences.
6. Mark added, removed, changed, and unchanged sections.
7. Show the result as side-by-side, unified, or summary output.
8. Copy the diff summary if needed.

Frequently Asked Questions

A text diff checker compares two text versions and highlights added, removed, changed, and unchanged content.

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