OneTaskAudio and Video Converters
WAV to MP3, Video to GIF, MOV to MP4 and Frame Rate Converters
Re-encode sound and video without installing an editor. Turn a WAV into an MP3, a MOV, MKV or WebM into an MP4, a screen clip into a GIF, a GIF back into a small video, or a folder of frames into a movie. Each conversion runs on the Web Audio, canvas and media APIs in your browser.
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Every Audio & Video tool
AAC To MP3
Convert raw .aac audio into an MP3 for any player.
Audio To Base64
Turn a short audio clip into a base64 data URI.
Audio To CSV/JSON
Export raw audio samples as CSV or JSON for analysis.
Audio To OGG/WebM
Encode audio to WebM or OGG Opus, or MP4 AAC, locally.
Audio To WAV
Convert MP3, M4A, FLAC or OGG to 16- or 24-bit WAV.
Audio To Video
Put a still image behind an audio file to make an uploadable video.
Bit Depth Converter
Convert 24-bit to 16-bit WAV with proper dither.
NewFLAC To MP3
Shrink lossless FLAC music into a portable MP3.
NewFLAC To WAV
Unpack lossless FLAC into a 16- or 24-bit WAV.
FPS Converter
Convert a video to a different frame rate, keeping its speed.
GIF To Video
Convert an animated GIF into a much smaller video file.
NewHEVC To H.264
Convert iPhone HEVC (H.265) video to H.264 that plays anywhere.
Image Sequence To Video
Join numbered still frames into a video at any frame rate.
NewM4A To MP3
Convert iPhone and iTunes M4A audio to MP3 in your browser.
NewM4A To WAV
Turn iPhone voice memos and M4A files into editable WAV.
NewMKV To MP4
Turn an MKV into an MP4 that phones, TVs and editors open.
NewMOV To MP4
Turn an iPhone or QuickTime MOV into an MP4 that plays anywhere.
NewMP3 To WAV
Turn an MP3 into an editable 16- or 24-bit WAV.
NewMP4 To MP3
Pull the sound out of a video and save it as an MP3.
NewMP4 To WebM
Convert an MP4 to a royalty-free VP9 WebM for the web.
NewOGG To MP3
Convert OGG Vorbis audio into an MP3 that plays anywhere.
NewOPUS To MP3
Turn WhatsApp and Telegram .opus voice notes into MP3.
Sample Rate Converter
Resample audio to 44.1, 48, 16 kHz or any common rate.
Screenshot To Video
Scroll a tall page screenshot smoothly from top to bottom as a video.
Stereo To Mono
Downmix stereo audio to mono and export it as WAV.
Text To Speech Downloader
Read text aloud in any browser voice and save it as audio.
Text To Video Card
Turn a line of text into a title card video with a simple animation.
NewVideo Converter
Convert MP4, MOV, MKV or WebM video to MP4 or WebM.
Video To Data URI
Turn a short clip into a base64 data URI or an inline video tag.
Video To GIF
Convert a short section of a video into an animated GIF.
Video To Image Sequence
Save a video's frames as numbered PNG or JPG files in a zip.
Video To WebP
Turn a video clip into a small, looping animated WebP.
WAV To MP3
Encode WAV or other audio to MP3, without uploading it.
NewWebM To MP3
Pull the audio out of a WebM file as an MP3.
NewWebM To MP4
Convert a WebM clip to an MP4 that plays on any device.
NewMP4 Compressor
Shrink a video to an MP4 under a target size in MB.
Audio formats and settings
WAV is uncompressed and large; MP3 and WebM Opus are compressed and small. The audio converters move between them and change the technical settings separately: sample rate for a target such as 44.1 kHz or 48 kHz, bit depth for 16-bit or 24-bit, and channel count for folding stereo to mono.
Video containers and codecs
MP4, MOV, MKV and WebM are containers that hold separately compressed video and sound. The video converters copy streams the new container already accepts, such as H.264 from an iPhone MOV into an MP4, and re-encode the rest with the browser's WebCodecs encoder. That covers MOV to MP4, MKV to MP4, WebM to MP4 and back, iPhone HEVC to H.264, compressing an MP4 to a target size and pulling the sound out as an MP3.
Video, GIF and frames
A GIF is easy to embed anywhere but large and limited to 256 colours. Converting a GIF to video shrinks it dramatically, while converting a video to GIF makes a clip that plays in places that refuse video. The frame tools split a video into numbered images or assemble images back into a video, and the frame rate converter retimes a clip.
Turning one medium into another
Some pages change the kind of media rather than its format: audio becomes a waveform video, text becomes a spoken audio file or a title card clip, and a screenshot becomes a short video for platforms that only accept video.
Practical limits
Encoding happens on your device, so speed depends on its processor and memory. Short clips convert in seconds on a phone; long or high-resolution video is better done on a desktop, and the pages say where that matters.
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