Best free offline file converter for Android (no uploads)
Most online converters upload your file to a server and add limits or ads. VX Converter does every conversion on the phone, so private videos and documents never leave it and it works without internet.
How to do it with VX Converter
- Open VX Converter and pick a file (or share it to VX Converter from any app).
- It detects the type and suggests formats — for a video: MP4, MKV, GIF, MP3 and more.
- Tap Convert; several files can run at once in the background.
- Find the result in Download/VX Converter or the folder you chose.
At a glance
| Video | MOV, MKV, WebM, AVI, 3GP to MP4 (and back), GIF, extract audio |
|---|---|
| Audio | MP3, M4A, AAC, WAV, FLAC, OGG, Opus; ringtone maker |
| Images & PDF | HEIC to JPG, JPG/PNG/WebP, images to PDF, PDF to images |
| Documents | Word (DOCX) to PDF, CSV ↔ XLSX, SRT ↔ VTT |
| Upload | None — offline on the phone |
| Price | Free |
Questions
What is the best free file converter app for Android?
VX Converter converts video, audio, images, PDFs and documents on the phone, offline and free, without uploading files.
Can I convert a video to MP3 without internet?
Yes. Pick the video, choose MP3 and tap Convert.
How do I open iPhone HEIC photos on Android?
Convert them to JPG with VX Converter, offline.
Is there a file size limit?
No fixed limit; it depends on your phone's storage.