Audio Quality Converter
Convert your audio file's sample rate up or down, from 8kHz to 48kHz. Lower the sample rate to shrink file size for voice memos or messaging apps, or raise it to match a specific production requirement. Everything happens locally in your browser — no upload needed. Sample rate determines how many times per second the audio waveform is measured, and a mismatch between your file's sample rate and what a platform or piece of software expects can cause playback issues or unnecessarily large file sizes. Lowering the rate for voice recordings destined for messaging apps can cut file size significantly with little audible difference for speech, while raising a low sample rate to match a production pipeline's requirement ensures compatibility even though it won't add back detail that wasn't captured originally.
How it works
- 1
Upload Audio
Upload the audio file you want to convert.
- 2
Choose Sample Rate
Select your target sample rate from the presets.
- 3
Convert & Save
Click [Convert & Save] to apply the change.
- 4
Export
Choose MP3 or WAV and download your file.
FAQ
What is a sample rate?+
Sample rate is how many times per second audio is measured. Higher rates (like 48kHz) capture more detail; lower rates (like 8kHz) produce smaller, lower-fidelity files.
Which sample rate should I choose?+
44.1kHz is the standard for music. 48kHz is common for video. 16kHz or 8kHz work well for voice-only recordings like voicemail.
Will lowering the sample rate reduce quality?+
Yes, lowering the sample rate removes high-frequency detail. It's best for voice or when file size matters more than fidelity.
Can I raise a low sample rate back up?+
You can convert it, but you can't recover detail that was never captured — upscaling won't restore lost quality.
Does this also change the bitrate?+
Sample rate and bitrate are different settings. For MP3 bitrate, use the Bitrate option in the export panel.
Will this work with any audio format?+
Yes — upload MP3, WAV, M4A, OGG, or FLAC, and export as MP3 or WAV.
What's the difference between this and Audio Converter?+
Audio Converter changes the file format (like WAV to MP3). This tool changes the sample rate (like 44.1kHz to 16kHz) while keeping the same format.
What sample rate should I use for voice memos?+
16kHz or 22.05kHz is usually enough for clear speech and keeps file sizes small.
Can I convert multiple files at once?+
Currently one file at a time. For batch conversion, repeat the process for each file.
Does this work offline?+
Yes. Once the page is loaded, all conversion happens locally in your browser — no internet connection needed.
Last updated August 5, 2026