Transcription Accuracy Tester (WER / CER)

Paste ground-truth transcript and one or more vendor outputs; compute WER and CER, highlight diffs word-by-word.

Privacy: All calculations run in your browser. Nothing you type or upload is transmitted.

What this tool does

Free transcription WER/CER tester. Compare ground truth to vendor ASR output, see word-level diffs, aggregate accuracy.

How to use

1. Fill the inputs or paste your data.

2. Click the calculate/decode/audit button.

3. Review the KPIs, charts, and callouts.

4. Use the related-tools strip at the bottom for the next step in your workflow.

Notes

• This tool is for estimation and exploration, not legal or regulatory certification.
• Report issues or request features via the feedback tab on the right edge of the page.