Detect
Measure the true pitch, not just the nominal key.
Pitch perfection, instantly.
Retune any recording with studio-grade precision.
Analyze, compare, and repitch to any reference A — from 380 to 570 Hz — then export in the format you need.
Works on desktop, tablet, and mobile
Multilingual interface
Fast or high-quality mode
Free forever. No ads. No account. No personal data stored.
The concept
Retune listens to your file, detects its real tuning, and lets you retune it in one click.
Compare
Instantly A/B the original and the retuned result.
Convert
Export to WAV, FLAC, MP3, AAC, or OGG.
Why musicians choose Retune
- Full control over reference pitch (baroque to modern)
- Two algorithms: fast preview or high-quality render
- No install required — runs in the browser
- Privacy-first: no account, no tracking
How it works
1. Upload a file
MP3, WAV, FLAC, M4A, OGG, AIFF… even large files.
2. Auto analysis
Retune detects the current tuning and cents offset.
3. Pick the target A
432 Hz, 440 Hz, or any value from 380–570 Hz.
4. Listen & compare
A/B preview without leaving the page.
5. Export
Choose a format and download the retuned file.
Detailed workflow
A complete guide for first-time users and pros.
- Open Retune and select your audio file.
- Wait for the analysis; the status appears under the button.
- Check the detected A and the suggested correction.
- Set the target pitch and fine-tune in cents if needed.
- Select the quality and output format.
- Click “Retune” and preview the result.
- Download the converted file — done.
100% free
Retune is completely free to use — no trials, no upsells.
No ads, no tracking
No advertising or trackers. Files are processed to create the result, then removed.
Formats & quality
Export WAV, FLAC, MP3, AAC, OGG, and more. Use fast mode for checks or high-quality for finals.
FAQ
Is it really free?
Yes. Free for everyone, no account needed.
Do you store my files?
No. They are removed after processing.
Does it work on mobile?
Yes, on modern mobile and desktop browsers.
Ready to retune?
Make historic tunings and modern standards sound right in minutes.