Frequently asked questions
How next-convert works, what it can convert and what to do when something goes wrong.
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What is next-convert?
A free file converter that runs in your web browser. It converts images, PDFs, audio, video and spreadsheets on your own device instead of on a server.
Do I need an account?
No. There is nothing to sign up for. Open the page, add your files and convert.
Is it really free?
Yes. There are no limits on the number of files or conversions, and no watermarks on the results.
Privacy and security
Are my files uploaded?
No. The page loads the conversion code from our server, and then your browser converts your files on your device. File contents and file names are never sent over the network.
Do you keep copies or logs of my files?
We can't, because your files never reach us. They are held in your browser's memory and are gone when you close or reload the page, or press Clear.
Is metadata removed?
Converted images don't include EXIF data such as camera details and GPS location. Converted audio doesn't include tags such as artist and cover art.
Formats and quality
Which formats are supported?
Images (JPG, PNG, WEBP, HEIC, GIF, SVG, TIFF, AVIF, BMP, ICO), PDF, audio (MP3, WAV, M4A, AAC, FLAC, OGG, OPUS), video (MP4, MOV, WEBM, MKV) and spreadsheets (XLSX, XLS, ODS, CSV, JSON). See the formats page for every conversion.
Will my files lose quality?
Lossless outputs such as PNG, WAV and TIFF keep everything that was in the source. Lossy outputs such as JPG, WEBP and MP3 remove a little detail to save space, and you control how much with the quality and bitrate options.
Can I convert Word, PowerPoint or ZIP files?
Not at the moment. next-convert sticks to formats your browser can convert reliably on your device. You can request a format.
Troubleshooting
A conversion failed. What can I do?
Read the message next to the file, it usually says what went wrong. Try another output format, update your browser or try a different browser. If it still fails, let us know which file type and browser you used.
Why is video conversion slow?
Video is decoded and encoded frame by frame on your device. A newer computer, a lower resolution or the Smaller file setting all make it faster.
My browser says it can't create a format.
Some browsers lack an encoder, for example for WEBP images or certain video codecs. The message will suggest another format, or you can use a current version of Chrome, Edge, Firefox or Safari.
Large files stall or the tab crashes.
Very large files need a lot of memory. Close other tabs and apps, convert files one at a time, or use a computer instead of a phone.