Line Diff
See added, removed, and unchanged prompt lines.
Prompt version review with token deltas
Prompt Diff Checker
Compare two prompt versions with line diffs, token counts, and token delta.
Prompt DiffToken DeltaVersion Review
Prompt diff
Compare prompt revisions, token changes, and line edits.
Prompt A
16 tokens
Prompt B
23 tokens
A tokens16
B tokens23
Token delta+7
Line edits+3 / -3
Diff
-You are a support analyst.
-Summarize the ticket.
-Return bullet points.
+You are a senior support analyst.
+Summarize the ticket and identify urgency.
+Return bullet points with confidence scores.
Capabilities
What this tool handles
Use Prompt Diff Checker to check the input, tune the settings, and copy a clean output.
Token Delta
Compare GPT-style token counts between versions.
Prompt Review
Review prompt changes before shipping workflows.
Workflow
Run it in three steps
Compare prompt changes and token deltas.
1
Paste Prompt A
Add the original prompt version.
2
Paste Prompt B
Add the changed prompt version.
3
Review Delta
Check line changes and token count differences.
Good for
Common jobs this tool supports
Prompt DiffLine-level prompt review
Token DeltaCompare prompt token size
Version ReviewCatch prompt regressions
Local ComparePrompts stay in browser
FAQ
Answers before you run it
Practical notes about output, privacy, and common settings.
Prompt Diff Checker adds prompt-specific token counts and token deltas alongside line-level changes.
Use next