Any file up to 500 MB. Drop several files and they come back as one ZIP. Many image, audio and video conversions run in your browser; anything else is uploaded and removed within the hour.
Convert your WEBP raster images to AVIF format instantly with ConvertX. This conversion is ideal for web developers and designers looking to adopt the newest image standards.
Both WEBP and AVIF are modern raster image formats designed for the web. WEBP relies on VP8 technology, while AVIF is based on the AV1 video codec, offering advanced compression techniques. When you transcode a WEBP file to AVIF, you are shifting from one lossy or lossless compression algorithm to another, which requires decoding the pixel data and re-encoding it using AV1 structures.
Since both WEBP and AVIF formats utilize lossy compression in many standard web use cases, transcoding between them constitutes re-compression. Repeatedly re-compressing lossy raster images will degrade visual quality and introduce generation artifacts.
We built this project so anyone can convert files without paywalls, accounts, or hidden limits. Here is what that promise means in practice.
Every converter on ConvertX is free to use: no trials, no premium tiers, and no credit packs. We will never put core conversion features behind a subscription. Whether you convert one photo or a hundred files a week, the price stays zero.
Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.
A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.
Raster and vector graphics for web, print, and photography.
Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF
Office files, PDFs, ebooks, and plain text.
Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT
Clips, streams, screen recordings, and movies.
Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG
Music, podcasts, voice recordings, and sound effects.
Common extensions: MP3, WAV, FLAC, OGG, AAC, M4A, OPUS
