Free online audio tool

Audio Speed Changer Online

Speed up lectures and podcasts, slow down language practice, or create faster and slower versions of audio files directly in your browser.

Upload audio file

Choose an audio file from your device. Processing happens locally in your browser when the format is supported.

Choose Audio File

MP3WAVOGGOPUSM4AAACM4RFLACAIFF

How it helps

Use speed changer on the go

Speed changes help with studying, podcast listening, language practice, transcription, music practice, and quick timing adjustments.

This browser tool changes playback speed during rendering. Pitch may change depending on the processing method, so preview the result before saving.

Processing runs in your browser after the file is decoded. Browser support depends on the file format, codec, device memory, CPU, and current browser features. For sensitive or confidential audio, review privacy practices carefully before using any online tool.

How to use

How to use this tool

Open the tool page. Choose the audio tool you need from the tools menu or related tools section.
Add your audio. Upload a supported audio file, choose multiple files for the joiner, or record from your microphone on the voice recorder page.
Adjust settings. Use the simple controls for fade, speed, normalization, silence removal, or compression.
Preview first. Listen to the processed preview before creating the final output.
Download manually. Create the output file, then click Download yourself. The page does not auto-download files.

Formats

Browser-supported audio input

The upload field accepts common audio extensions, but the browser must be able to decode the actual file. MP3 and WAV are the safest choices. OGG, OPUS, M4A, AAC, M4R, FLAC, and AIFF vary by browser and operating system.