Free Text Diff

Compare two texts and see exactly what changed — additions, removals and unchanged lines, all in your browser.

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

    The original version you want to compare from.

  2. 2

    Paste Text B

    The edited or new version — the diff updates as you type.

  3. 3

    Read the diff

    Green rows were added, red rows removed, neutral rows unchanged. Copy or download the full result.

Key features

InputDiff
Same text in bothIdentical — no differences
Added line in BHighlighted green (+)
Removed line from AHighlighted red (−)
Arabic / emoji / RTLRendered safely, dir="auto"

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.

  • No uploads, no accounts, no sign-up
  • No cookies or tracking of your text
  • 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 — the only requests you will ever see are this page's own static files (HTML, CSS, JavaScript). Nothing you type is ever transmitted.

Frequently asked questions

How is the diff calculated?
A longest-common-subsequence algorithm aligns unchanged lines and flags only genuine additions and removals.
Are large texts handled?
Yes — common prefixes/suffixes are trimmed first, and very large inputs fall back to a fast greedy matcher.
Does it detect word changes?
This tool shows line-level changes. Use Find Differences for word-level analysis.
Private?
Fully — both texts are compared locally in your tab and never sent anywhere.

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