--- title: "Audio Resampler" description: "Change the sample rate of an audio file, 44.1 kHz to 48 kHz and back. Runs in your browser, accepts files up to 100 MB and writes a lossless WAV." url: https://findutils.com/media/audio-resampler/ category: media --- # Audio Resampler Change the sample rate of an audio file, 44.1 kHz to 48 kHz and back. Runs in your browser, accepts files up to 100 MB and writes a lossless WAV. **Use this tool:** [Audio Resampler](https://findutils.com/media/audio-resampler/) ## Programmatic access - Browser-only: this tool works on a file, the DOM, or a browser API and has no REST or MCP id. ## Why use our Audio Resampler? Our audio resampler changes the sample rate of an audio file to match a platform or a project. Whether you need CD quality (44.1 kHz), the video and broadcast standard (48 kHz), or a smaller voice recording at 16 kHz, the quick presets cover the common conversions and a custom field covers the rest. The work happens in your browser: an OfflineAudioContext from the Web Audio API resamples the decoded audio and the result is written as a lossless WAV, whatever you put in. Decoding relies on the browser's own audio decoders, so FLAC and OGG support depends on the browser you are in. Files up to 100 MB are accepted and the file itself stays on your device. ## Audio Resampling Tips - Always resample before editing. Converting sample rates after applying effects can introduce subtle artifacts that degrade your final mix. - Use 48 kHz as your default for video projects. It is the universal standard for film, television, YouTube, and streaming platforms. - Downsampling removes frequencies above the new Nyquist limit. For music, avoid going below 44.1 kHz to preserve the full audible spectrum (20 Hz to 20 kHz). - For voice-only content like podcasts or phone systems, 16 kHz to 22.05 kHz is sufficient and dramatically reduces file size compared to 44.1 kHz or 48 kHz. - If you need a different output format after resampling, use an audio format converter to encode the WAV result into MP3, OGG, or FLAC. ## Frequently Asked Questions ### What is sample rate? Sample rate is the number of audio samples captured per second, measured in Hz. Higher sample rates capture more detail but create larger files. Common rates: 44.1 kHz for music, 48 kHz for video. ### What sample rate should I use? 44.1 kHz is CD quality and good for music. 48 kHz is standard for video and streaming platforms. Use our Quick Presets for automatic recommendations based on your use case. ### Will resampling affect audio quality? Yes, in one direction. Downsampling permanently removes the high-frequency content above the new Nyquist limit, so 48 kHz down to 16 kHz is a real loss. Upsampling adds no new detail but costs nothing in quality; it only improves compatibility. The Web Audio API resampler is used for both, which keeps artifacts low. ### Are my files uploaded to a server? No, not the file. The resampling runs in your browser and the tool code sends no part of your audio to a server. The page itself loads analytics and ad scripts, as most websites do, so a network monitor shows requests from those. They are separate from the tool code. ### What output format is used? Every resampled file is written as a lossless WAV, whatever format you put in. If you need MP3, OGG or FLAC afterwards, run the WAV through the Audio Format Converter, which offers those formats when your browser can encode them. ### What audio formats can I resample? MP3, WAV, OGG and FLAC files up to 100 MB; anything larger is refused before decoding starts. The resampled output is always a lossless WAV. Decoding uses the browser's own audio decoders, so FLAC and OGG support depends on the browser you are in. If you need a different format afterward, use the Audio Format Converter. ### What is the difference between 44.1 kHz and 48 kHz? 44.1 kHz is the CD standard and captures frequencies up to 22.05 kHz, covering the full range of human hearing. 48 kHz is the video and broadcast standard, capturing up to 24 kHz. For most listeners the difference is inaudible, but matching the correct rate avoids sync issues in video editing. ### Can I upsample audio to improve quality? No. Upsampling increases the sample rate but adds no audio detail that was not in the original recording. It is useful for meeting a format requirement, such as taking a 44.1 kHz file to 48 kHz for a video editor, but it will not make a low-quality recording sound better. ### Does this audio resampler require a signup? No. The resampler is free, with no signup and no usage limits. The work happens in your browser, so there is no server cost behind the page to pass on to users. ### What sample rate does YouTube recommend? YouTube recommends 48 kHz for uploaded audio. While it accepts other rates, 48 kHz avoids an extra server-side conversion step and preserves the best possible quality on the platform. ## Related Tools - [Audio Format Converter](https://findutils.com/media/audio-format-converter/) - [Audio Trimmer](https://findutils.com/media/audio-trimmer/) - [Audio Metadata Extractor](https://findutils.com/media/audio-metadata-extractor/) - [Extract Audio from Video](https://findutils.com/media/video-to-audio/) - [Video Format Converter](https://findutils.com/media/video-format-converter/) - [Video to GIF Converter](https://findutils.com/media/video-to-gif/) - [Image Compressor](https://findutils.com/convert/image-compressor/) - [File Hash Calculator](https://findutils.com/security/file-hash-calculator/)