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.
Easily convert your MP4 video files to AVI format. This tool is perfect for users who need to make modern web-standard video files compatible with legacy software and hardware players.
MP4 (MPEG-4 Part 14) is a highly compressed, efficient container designed for modern digital streaming and mobile devices. AVI (Audio Video Interleave), developed by Microsoft, is an older container format. Converting from MP4 to AVI involves repackaging the video and audio streams, as both formats function as containers. Since both formats typically use lossy codecs, this process requires re-encoding, which inherently leads to a slight degradation of the original image data.
Because both MP4 and AVI are lossy containers, the conversion process involves re-compression, which will cause a minor loss in visual quality. The final file size will remain largely unchanged compared to the source.
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.
Clips, streams, screen recordings, and movies.
Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG
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
Music, podcasts, voice recordings, and sound effects.
Common extensions: MP3, WAV, FLAC, OGG, AAC, M4A, OPUS
