Prompt Diff & Version Compare
Compare two prompt versions side-by-side. See exactly what changed with token counts.
Diff Mode:
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FAQ
Why do I need a prompt diff tool?
When iterating on prompts, it's crucial to track exactly what changed between versions. Small wording changes can significantly affect LLM output. This tool highlights every difference and shows the token count impact.
What diff modes are available?
Three modes: Line-level (compare line by line), Word-level (compare word by word), and Character-level (compare character by character). Word-level is usually the most useful for prompt comparison.
Can I share a diff?
Yes! Click 'Share' to generate a URL that encodes both prompts. Send the URL to a colleague and they'll see the same diff. All data is encoded in the URL hash — nothing is stored on any server.