Skip to main content
dubinity

Developer & Web

Diff Checker

Compare two texts side by side or inline, with word-level highlighting and line, word or character modes.

  • Runs in your browser
  • Works on mobile
  • In: TEXT
  • Out: TEXT
Loading the tool…

Your files and text are processed on your own device, inside this page. Nothing is uploaded to Dubinity or stored, and closing the tab discards it. How privacy works

About Diff Checker

Paste two versions of anything - a contract, a config file, a block of code - and see exactly what changed. Lines are matched first and then each changed pair is compared word by word, so a single edited word shows as that word rather than a whole rewritten line.

Side by side, inline and unified views are all available, unchanged lines can be folded away with three lines of context, and case or whitespace differences can be ignored. The result can be copied or downloaded as a .diff patch.

Both texts stay in the page; nothing is uploaded. Very large, very different inputs are given a four second deadline and the tool says so rather than freezing the tab.

How to use it

  1. 1Paste the original version in the first box.
  2. 2Paste the changed version in the second box.
  3. 3Choose side by side, inline or unified, and whether to compare by line, word or character.
  4. 4Copy the diff or download it as a .diff file.

Questions

Was this tool helpful?

Related tools

All developer tools

  • Duplicate Content Checker

    Compare two texts and see how much they share, with the repeated passages highlighted in both.

    TEXT
    Runs in your browserOpen tool

  • Text Cleaner

    Fix text copied from a PDF or email: extra spaces, broken line breaks, invisible characters, stray HTML.

    TEXT
    Runs in your browserOpen tool

  • Remove Duplicate Lines

    Strip repeated lines from a list, ignoring case and spacing if you want, keeping the first or last copy.

    TEXT
    Runs in your browserOpen tool

  • Word Counter

    Count words, characters, sentences and paragraphs as you type, with reading time and SMS segments.

    TEXT
    Runs in your browserOpen tool

  • JSON Formatter

    Format and indent JSON, or minify it, with exact error positions and big numbers kept as written.

    JSON
    Runs in your browserOpen tool

  • Password Generator

    Create strong random passwords with the character rules a site demands, and see the real entropy.

    NONE
    Runs in your browserOpen tool