Free Text Compare

🟢 Runs Locally — verified: your files are processed in this browser. No uploads.

Side-by-side comparison with a similarity score and per-side statistics — no accounts, no uploads.

Word Counter

Runs entirely in your browser — paste text and watch the results update instantly. Nothing is uploaded.

100% Client-Side — Your text stays in your browser. Nothing is uploaded.

How to use this tool

  1. 1

    Paste Text A

    Your first document, snippet or paragraph.

  2. 2

    Paste Text B

    The second text to compare against.

  3. 3

    Read the report

    Similarity %, identical flag, and line/word/character counts for both sides.

Key features

MetricMeaning
100%Identical token sets (or both empty)
0%No shared words
StatisticsLines, words and characters per side
FormulaDice coefficient — documented, not AI

Privacy: your text never leaves your browser

Every Toolflect Text Tool is 100% client-side. The moment you type or paste text, it is analyzed by JavaScript running inside this browser tab. Your text is never sent to our servers, never stored in a database, and never shared with any third party or AI service. Visit counting (see the note at the foot of this page) is separate from your text and never receives it.

  • No uploads, no accounts, no sign-up
  • Your text is processed locally in your browser and never stored.
  • Works offline once the page has loaded
  • Close the tab and your text is gone from memory

You can even verify it yourself: open your browser's developer tools, switch to the Network tab, and type into the tool — no request ever carries your text. You will also see the Google Analytics request that counts the visit; it carries a page view and never anything you typed, and no cookie or identifier is stored until you accept analytics.

Frequently asked questions

How is the similarity percentage calculated?
Similarity = 2 × common word tokens ÷ (tokens in A + tokens in B) × 100, using the Dice coefficient on word counts. It is a lexical overlap measure — explicitly not semantic or AI similarity.
Do identical texts give 100%?
Yes, and the report also shows an explicit Identical: Yes/No line.
What if one side is empty?
Similarity is 0% unless both sides are empty, which counts as 100%.
Private?
Fully — comparison runs locally in your tab; neither text ever leaves the browser.

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Your text stays in your browser and is not uploaded. We use Google Analytics to count visits; until you choose it runs without cookies and stores nothing on your device. · Privacy Policy