Prompt Diff Checker
Diff two prompt drafts side by side. Use line-level for large files (auto-fallback above 50k characters) or word-level for small rewrites. Insertions and deletions are color-coded in the preview.
Original Prompt
Paste or type your content here…
Revised Prompt
Second input…
Results
Paste an original prompt and a revised prompt to see what changed.
Frequently Asked Questions
What if the prompts are identical?
The output says No differences found instead of an empty pane.
Does this call an LLM?
No. It is a local text diff.