Text Diff
Paste two pieces of text or code and highlight the differences word-, line-, or character-by-character. Great for comparing ChatGPT vs Claude output, or diffing two content drafts.
Differences
When to use this
- Compare AI outputs: paste output from two models (ChatGPT vs Claude vs Gemini) and see where they differ — which one is more concise, which adds extra fluff.
- Diff content drafts: v1 vs v2 of an article, see what an editor changed.
- Simple code diff: short code snippets — verify a bug fix or refactor.
- Verify translations: paste original + back-translation, spot meaning loss.
3 diff modes
- By word (default): best for prose and natural language.
- By line: like
git diff— for code or config files. - By character: maximum detail — catches typos and punctuation changes.
Who this is for
Fullstack/backend/devops engineers — debug JWT, format JSON/SQL, parse cURL, compute CIDR subnets, draft Mermaid diagrams, write conventional commits… Daily toolkit alongside your terminal and editor.
FAQ
Is my pasted code/token sent anywhere?
No. All TopDev dev tools run 100% client-side — JWT, SQL, JSON, cURL, regex… process in-browser. Disconnect to verify. Safe for internal tokens, production DB queries, API keys.
Does it work offline / install as a PWA?
Tools work offline after the first load. Installable PWA is on the roadmap — for now you can bookmark and use without internet.
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