Change Audio Bitrate
âšī¸ How it works:
- Upload your audio file
- Choose a bitrate and sample rate
- Download the adjusted audio
Change Audio Bitrate and Sample Rate Online for Free
This is the tool for when you know the number you need. Set an exact bitrate between 64 and 320 kbps, or an exact sample rate between 8 kHz and 192 kHz — the panel shows what your file currently is, so you can see exactly what you are changing. Lower the bitrate to make an MP3 smaller, raise the sample rate to satisfy a program that insists on 48 kHz, or match a specification someone has handed you. No sign-up and no watermarks.
How to Change the Bitrate of an MP3
- Click the upload area above or drag and drop your audio file (up to 10 MB).
- Pick a bitrate (64–320 kbps) and a sample rate (8 kHz–192 kHz). The panel shows your file's current values to compare against.
- Apply and download your adjusted audio.
Understanding Bitrate and Sample Rate
- Bitrate (kbps) – how much data is used per second of audio. Higher bitrate = better quality but a bigger file. Common values: 128, 192, 256, 320 kbps.
- Sample Rate (Hz) – how many audio samples are taken per second. Common values: 22050, 44100 (CD), 48000 Hz (video).
Common Bitrate Settings
- 64 kbps – low quality, very small files; fine for speech only
- 128 kbps – standard quality for general listening
- 192 kbps – good quality, balanced size and fidelity
- 256 kbps – high quality, hard to tell from the original
- 320 kbps – maximum MP3 quality
Common Sample Rates
- 8–16 kHz – telephone and voice-only audio
- 22,050 Hz – speech content where size matters more than fidelity
- 44,100 Hz – CD quality, and the default for music
- 48,000 Hz – the standard for video and broadcast audio
- 96,000 Hz and above – studio rates, useful when the audio will be processed further
When You Might Need This
- A submission spec that names an exact bitrate or sample rate you have to hit
- Video software that will only accept 48 kHz audio
- Making an MP3 smaller when you know precisely how small it needs to be
- Matching a set of files so they are all consistent before editing them together
- Bringing a needlessly high studio-rate file down to something ordinary
- Cutting a spoken-word file to 64 kbps, where the quality loss is inaudible
- Checking what bitrate a file actually is — the panel tells you before you change anything
Frequently Asked Questions
For music, 192–320 kbps gives excellent quality. For speech and podcasts, 96–128 kbps is plenty. For voice memos or phone audio, 64 kbps works fine.
No. Raising the bitrate of an already-compressed file can't restore detail that was lost — it only makes the file bigger. For the best result, start from the highest-quality source you have.
Not really. WAV is uncompressed and FLAC is lossless, so they don't use a target bitrate — for those files only the sample rate change applies. Bitrate matters for compressed formats like MP3, OGG, M4A and AAC.
44100 Hz (CD quality) is the standard for music, 48000 Hz is standard for video audio, and 22050 Hz is enough for speech-only content.
They control different things and are easy to confuse. Sample rate is how many times per second the sound was measured when it was recorded, and it sets the ceiling on how high a frequency the file can represent at all. Bitrate is how much data is spent describing each second afterwards, which is what a compressed format like MP3 trades away to be small. Roughly: sample rate is about how much of the sound was captured, bitrate is about how carefully it is stored. For most everyday jobs you want to change the bitrate and leave the sample rate alone.
It is worked out from the file's size and its length, so treat it as a close estimate rather than a label read off the file. For a variable-bitrate MP3 — where the encoder spends more data on complex passages than on quiet ones — the figure you see is the average across the whole track, which is the useful number anyway. An uncompressed WAV will show a very large value, around 1,411 kbps for CD-quality stereo, because it stores everything.
The same underlying idea, aimed at two different people. Compress Audio asks how much smaller you want the file, works out a bitrate for you, and always hands back an MP3 — the right tool when the problem is “this will not attach to an email”. This page assumes you already know the figure you need, lets you set it precisely along with the sample rate, and keeps the format you started with. Come here when a specification is telling you the number.
MP3, WAV, OGG, FLAC, AAC and M4A, up to 10 MB. Bitrate applies to the compressed formats; for WAV and FLAC only the sample rate change takes effect. If your file is over the limit, Compress Audio or Trim Audio will bring it down first.
Related Audio Tools
- Compress Audio – reduce file size automatically
- Convert Audio – change the audio format
- Adjust Volume – make audio louder or quieter
- Enhance Audio – normalize, EQ, de-ess and more
- Trim Audio – cut your audio to length