Convert1

One place for video, audio and photo conversion

Convert1 turns clips, songs, voice notes, GIFs and photos into the format you need with 74 free tools. The media is decoded and re-encoded on your computer or phone, so a 4 GB phone video never has to travel to a server first.

PNG to JPGImage ConverterImage CompressorJPG to PNGWebP to PNGHEIC to JPGResize ImageVideo ConverterMOV to MP4WEBM to MP4Video CompressorAudio ConverterMP4 to MP3M4A to MP3
Your hardware does itWebCodecs taps the video encoder built into your graphics chip; FFmpeg compiled to WebAssembly covers the rest.
Big files are fineLong recordings and full-resolution phone footage are read straight from disk instead of being pushed through an upload.
Whole albums at onceQueue a folder of tracks or a camera roll export and save every result in a single ZIP.
Nothing to installNo app, no extension, no sign-in. Close the tab and nothing is left behind on any server.

Video

All 17 →
Video ConverterSwitch clips between MP4, MOV, MKV, WebM, AVI, FLV, WMV, OGV and MPEG-2 on your own device. Streams are copied when they fit, nothing is uploaded.MOV to MP4Turn iPhone videos and Mac screen recordings from MOV into MP4. H.264 is rewrapped in seconds, HEVC becomes H.264. Runs in your browser, no upload.WEBM to MP4Make WebM screen captures and browser downloads play in iMovie, PowerPoint, WhatsApp and on iPhone by converting them to MP4. Runs in your browser.Video CompressorShrink phone clips and screen recordings to a size in MB, a percentage or a quality level. Hardware encoding where possible, never a bigger file.

Audio

All 15 →
Audio ConverterChange songs, voice notes and podcast files between MP3, WAV, M4A, FLAC, OGG, Opus, WMA and AIFF, or grab the sound from a video. Runs on your device.MP4 to MP3Save the audio of MP4 clips, music videos and recorded lessons as MP3 with LAME, at 64–320 kbps or VBR. Batch convert in your browser, no upload.M4A to MP3Convert M4A voice memos, podcast episodes and iTunes tracks (AAC or ALAC) to MP3 for car stereos and old players. Batch, in your browser, no upload.WAV to MP3Make WAV recordings, mix-downs and samples small enough to send: MP3 at 64–320 kbps or VBR with LAME. Batch whole folders on your own device.

GIF

All 3 →
Video to GIFMake a looping GIF from a moment in MP4, MOV, WebM, MKV or AVI. Set start, end, width, frame rate and colours; the palette is built per clip.

Image

All 39 →
PNG to JPGTurn PNG screenshots, video stills and design exports into small JPG files on your own device. Pick quality and background, batch the lot.Image ConverterConvert phone photos and web images between HEIC, JPG, PNG, WebP, AVIF, GIF, TIFF and more. Resize on the way, batch whole folders, no upload.Image CompressorShrink photos and screenshots before you send or post them. MozJPEG, OxiPNG and libwebp run on your device, with the saving shown for every file.JPG to PNGSave JPG photos and video stills as lossless PNG before you edit, caption or layer them. Batch convert and resize on your own device, no upload.WebP to PNGGet web-saved WebP pictures into PNG so video editors and slide apps accept them. Transparency is kept, batch convert with no upload.HEIC to JPGTurn iPhone HEIC photos into JPG in Chrome, Edge or Firefox on Windows and Android. libheif decodes them in the tab; batch convert, nothing uploaded.Resize ImageResize phone photos, video frames and screenshots by percent, width, height, a box or exact pixels. Batch hundreds of pictures in your browser.

Built for media files

Video and audio are the files that hurt most on upload-based converters: a ten-minute 4K clip can be several gigabytes, and the free tiers stop at one. Convert1 skips the transfer completely. Your browser reads the file, the conversion runs in a background worker, and the result is written back to your downloads folder.

Photos get the same treatment. iPhone HEIC pictures, WebP images saved from websites and huge PNG exports can be turned into JPG, PNG, WebP or AVIF in batches, with an optional resize so they are ready to post or attach.

What speed to expect

Changing the container, for example MKV to MP4 with the same H.264 stream inside, is close to instant because nothing has to be re-encoded. Re-encoding video is limited by your processor and graphics chip: a recent laptop usually handles 1080p faster than real time, while an older phone may take about as long as the clip itself.

Audio is light work by comparison. Extracting the soundtrack from a film or turning a WAV recording into MP3 normally takes a few seconds per track.