Text Difference Checker

How to use

1. Paste your original text in the left panel.
2. Paste the revised version in the right panel.
3. Differences appear automatically below, additions in green, removals in red, unchanged lines shown normally.

Tips for best results

• Format JSON before comparing. If you're comparing two JSON payloads, paste each through the JSON formatter first to normalize whitespace. A single extra space in a minified JSON string marks the entire line as changed, making the diff output nearly unreadable without normalizing first.
• Normalize casing to reduce noise. If two versions of a document use inconsistent capitalization and you only care about content changes, convert both to the same case using the case converter before pasting, this filters out casing-only differences so actual content changes stand out clearly.
• Track word count changes alongside the diff. After reviewing the diff, paste the new version into the word counter to confirm whether additions or deletions moved the total word count out of a required range, useful for SEO meta descriptions, social copy and constrained content fields.
• Use it for contract and policy review. Paste the old and new versions of a contract clause side by side to see exactly which words changed. This is faster and more reliable than reading two documents side by side, especially for minor edits buried in long paragraphs.

Why use PixMidas

• Instant comparison. No button to press, differences appear as soon as both panels have content.
• Clear color coding. Green for additions, red for removals, unchanged lines in their original color.
• No account needed. Free. Text comparison runs locally on your device.

Frequently asked questions

How does text diff work?

The tool compares the two texts line by line. Lines that appear only in the original are marked as deleted (red). Lines that appear only in the revised version are marked as added (green). Lines identical in both texts are shown unchanged. This gives an immediate visual summary of exactly what changed between the two versions. The underlying algorithm is similar to the diff utility used by version control systems like Git, where the goal is to identify the minimum set of additions and deletions that explain the difference.

Is this line-level or word-level comparison?

The comparison works at the line level, it identifies which entire lines were added, removed or unchanged. This is well-suited for code, structured text and documents where line boundaries are meaningful. For single-sentence changes, word-level diff (available in full code editors like VS Code) gives more granular output. For comparing JSON or configuration files where whitespace matters, format both documents first using the JSON formatter to ensure consistent indentation before diffing.

What are the most common use cases?

Comparing two drafts of an article to see what an editor changed. Verifying that only approved edits were made to a contract. Reviewing config file changes without a development environment. Checking the difference between two versions of terms, policies or formal documents. Spotting unauthorized changes to web copy. The tool is also useful for academics comparing two editions of a cited source when footnote or wording variations need to be documented precisely.

Is there a character limit?

No enforced limit. Very large texts may cause a slight processing delay but will complete. For most practical document comparison tasks the tool responds instantly. If you're also tracking word count changes between versions, paste each version separately into the word counter and compare the totals alongside the diff output.

Is my text safe?

Yes. Both text inputs stay entirely withon your device. All comparison logic runs locally using JavaScript. Nothing is transmitted to any server at any point. This makes the tool safe for comparing confidential documents, legal contracts, internal policy drafts or any sensitive text, the comparison happens on your device, not on a remote server.