stars PixLab | Convert Box

Convert Box

Convert Files Faster, Securely & Locally with Convert Box

Convert files between more than 239 formats, including HEIC, JPG, PNG, WEBP, FLAC, MP4, and MP3, with Convert Box. Securely convert files within your browser. Convert Box prioritizes data privacy by processing conversions locally, eliminating the need for uploads to remote servers. Drag and drop files for immediate conversion.

All Formats
image Images
play [#1003] Created with Sketch. Videos
Audio

Convert files freely—offline, privately, and without format restrictions.

Key Features & Benefits

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Secure & Private

All files stay on your device during conversion—no transfers to external servers. Feel at ease knowing your data is never exposed.

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Extensive Format Support
Easily handle popular and obscure formats alike: images, documents, audio, video, and beyond. Convert MP4 to MP3 and more.
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Batch Conversion

Save time by converting multiple files simultaneously. Perfect for entire folders, photo collections, or large video libraries.
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No Installation Required

Use Convert Box right in your browser. Eliminate the need for clunky software, plug-ins, or device-specific downloads.

How to use Convert Box?

1
Select Your Files
Drag and drop one or more files directly into the Convert Box window, or click the "Add Files" button to browse your local storage.
2
Choose Your Conversion Format
A menu will appear prompting you to select from 239+ supported formats (e.g., MP4, PNG, etc.). Pick the target format that suits your needs.
3
Adjust Settings (Optional)
Depending on the format, you can choose options like file quality, compression level, or resolution. This step is optional for a quick default conversion.
4
Click "Convert"
Hit the "Convert" button to start the process. Since everything runs locally in your browser, there's no waiting for online servers.
5
Download The Converted Files
Once the conversion is done, your transformed files are immediately available to download to your device—safe, private, and hassle-free.
upload

Frequently Asked Questions

Yes, Convert Box is 100% free. You can convert as many files as you need without any hidden fees or subscription costs.

No. Convert Box runs entirely in your browser. There is no need to install software or plugins on your computer.

Absolutely. All file conversions happen locally in your browser. Your files never leave your device, ensuring the highest level of privacy and security.

Convert Box supports over 239 file formats, including popular image, audio, video, and document types such as JPG, PNG, MP4, MP3 and many more.

Yes. The batch conversion feature lets you drag and drop several files—or even entire folders—to convert them all simultaneously.

We strive to cover every major and many niche formats. If you encounter a format that isn’t supported, please let us know so we can add it in a future update.

Conversion speed varies depending on file size and your device’s performance, but local conversion ensures the process is typically much faster than online converters.

Most modern browsers allow handling of large files without issue. However, extremely large files may be constrained by your device’s processing power and available memory.