UsefulTab
Audio & Video
Trim, convert, and adjust audio and video — entirely in your browser.
7 tools in this category, all running locally in your browser.
Edit audio and video without uploading a single file. Trim an audio clip to just the part you need, cut leading and trailing silence, adjust or normalize the volume, change playback speed, convert a recording to WAV or a compressed WebM, extract the soundtrack from a video, or trim a video down to a short clip. Everything runs on your own device using the browser's built-in Web Audio, MediaRecorder, and Canvas APIs, so voice memos, interviews, music, and personal videos never leave your computer — which also means there is no file-size upload limit and it keeps working offline once the page has loaded.
Audio Trimmer
Trim an MP3, WAV, or M4A to a start/end selection and download the clip as WAV — all in your browser.
Silence Remover
Automatically cut the silent gaps at the start and end of an audio clip and download a tighter WAV — locally.
Volume Changer
Boost or reduce the volume of an audio file, or normalize it to full level, and download a WAV — all locally.
Audio Speed Changer
Change how fast an audio file plays — speed it up or slow it down — and download a WAV, all in your browser.
Audio Converter
Convert MP3, M4A, OGG, and more to WAV — or to WebM/Opus where your browser supports it — all locally.
Extract Audio from Video
Extract the audio track from an MP4, WebM, or MOV video and download it as WAV — all in your browser.
Video Trimmer
Trim a video to a start/end selection and download the clip as WebM — captured entirely in your browser.
Common questions
Are my audio and video files uploaded anywhere?
No. Every tool decodes and processes your media locally in the browser using the Web Audio and MediaRecorder APIs. Nothing is sent to a server, so recordings and videos never leave your device.
Which formats can I open and export?
You can open any audio or video format your browser can decode — typically MP3, WAV, M4A/AAC, OGG, WebM, and MP4. Exports are produced by the browser: audio edits are saved as WAV (universally compatible), and video/extracted-audio exports use WebM, the format browsers encode natively.
Why is my exported audio a WAV and larger than the original?
Browsers can reliably encode uncompressed WAV from edited audio but do not expose an MP3 encoder, so trimmed and adjusted audio is exported as WAV. WAV is lossless and plays everywhere; if you need a smaller file, re-compress the WAV to MP3 afterwards.
Is there a file-size or length limit?
There is no fixed limit, but audio is decoded fully into memory to be edited, so very long or high-resolution files use more RAM and take longer on phones or older machines. Trimming a shorter section first keeps things fast.
Does it work in every browser?
The tools work in modern browsers that support the Web Audio and MediaRecorder APIs — current Chrome, Edge, Firefox, and Safari. Exact export formats depend on what your browser can encode, which the tool detects automatically.