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 WMA audio files to the highly efficient OPUS format. This tool is ideal for users looking to modernize legacy Windows Media Audio files for web streaming and contemporary media players.
WMA (Windows Media Audio) is a proprietary container developed by Microsoft, primarily used for Windows-based systems. OPUS, conversely, is an open-source, royalty-free audio codec designed for low-latency streaming and high-fidelity sound across various network conditions. When converting WMA to OPUS, the audio is transcoded from one lossy codec to another, effectively re-encoding the bitstream into the more modern, versatile OPUS structure.
Since both formats use lossy compression, the conversion process involves re-encoding, which inherently causes a minor loss in audio fidelity. Keep in mind that the final file size will remain relatively similar to the original.
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.
Music, podcasts, voice recordings, and sound effects.
Common extensions: MP3, WAV, FLAC, OGG, AAC, M4A, OPUS
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
