Text Diff Checker Online
Runs 100% in your browser — your files never leave your device.
A full code editor is overkill when you only need to see what changed between two drafts, configuration snippets, or lists. Paste the original and revised text side by side; removed lines appear red and struck through, while added lines appear green.
How it works
- 1
Paste the original text
Put the earlier version in the left panel.
- 2
Paste the changed text
Put the revised version in the right panel.
- 3
Review the highlights
Red lines were removed; green lines were added.
Related tools
Add Text to Each Line — Prefix & Suffix Tool Add a prefix, suffix, or both to every line of your text or list. Ideal for building quotes, code snippets, and formatted lists — free and instant. ASCII Text Art Generator Turn text into large ASCII art using bundled Figlet fonts. Choose from popular styles, preview instantly, and copy the result. Free and offline. Case Converter — UPPERCASE, lowercase, camelCase & More Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and more. Free online case converter — no sign-up needed. Convert Spaces to Tabs Online — Fix Indentation Fast Convert leading spaces to tabs across your text or code with a selectable tab width. Paste your code and get clean tab indentation instantly and free. Convert Tabs to Spaces Online — 2, 4, or 8 Spaces Convert tabs to spaces across any text or code with a selectable width of 2, 4, or 8 spaces. Free online converter that runs in your browser. Count Lines in Text Online Count the lines, words, and characters in any text instantly — live as you type. Free, in your browser, nothing uploaded.
More text tools
Word Counter — Count Words & Characters Count words, characters, sentences, and paragraphs in real time. A free online word counter for essays, posts, and meta descriptions — no sign-up needed. Text Statistics — Word, Character & Readability Analysis Analyze any text instantly: words, unique words, characters, sentences, lines, average word length, and reading time. Free, private, in-browser analysis. Lorem Ipsum Generator — Placeholder Text in Seconds Generate lorem ipsum placeholder text by paragraphs, sentences, or words. Free lorem ipsum generator for mockups and layouts — right in your browser.