Frequently asked questions
Answers to common questions about file tools and conversion: limits, privacy, quality and supported formats.
General questions
Are my files uploaded to a server?
No. Files are processed in your browser and never leave your device. The internet is needed only to load the page and the engine for the format - the processing itself doesn't depend on the connection speed.
Is the site free?
Yes, all tools are free, without registration and without watermarks on the result.
Is there a file size limit?
Images - up to 256 MB, audio, PDF and archives - up to 512 MB, video - up to 2 GB, spreadsheets and e-books - up to 200 MB, fonts, subtitles and Word, Excel and PowerPoint documents - up to 50 MB. The unpacked contents of an archive are up to 1 GB, and files for a new archive up to 768 MB in total. In practice the limit also depends on the free memory of your device.
How do I process many files at once?
Add all the files at once - most tools process them as a batch with the same settings, and in the converter the format can be chosen for each file or for all of them. The results download one by one or as a ZIP archive, and in Chromium-based browsers they can be saved straight to a folder.
Why is processing slow?
Everything is computed on your device. The first time you use a format, the browser loads its engine - on a slow connection this is noticeable. Video, AVIF images and text recognition need the most resources; close heavy tabs and keep the page open until processing ends.
Images
How do I reduce the size of a photo?
Open the "Compress image" tool: it recompresses the photo in the same format with optimal settings. Converting to WebP or AVIF with quality 60–80 and reducing the resolution make the file even smaller.
What happens to transparency when converting to JPG?
JPG does not support transparency, so transparent areas are filled with a color - white by default, another color can be chosen in the settings. To keep transparency, choose PNG, WebP or AVIF.
Will the animation of a GIF be kept?
When converting between GIF, WebP and APNG - yes. Formats without animation get the first frame, or all frames as separate files in a ZIP if you choose "All as separate files (ZIP)" in the "Frames and pages" setting.
Video and audio
Which video codecs are available?
H.264, H.265 (HEVC), VP8, VP9 and AV1 - the list depends on what your browser can encode. When the browser cannot, the built-in FFmpeg is used, which is slower.
How do I extract sound from a video?
Open the "Extract audio from video" tool or add the video to the converter and choose an audio format - MP3, M4A, WAV, FLAC or OGG. The video track is dropped, and the sound can be trimmed and its bitrate changed.
Documents and fonts
Can I extract text from a scanned PDF?
Yes. In the "PDF to text" tool, pages without a text layer are recognized (OCR) in English and Russian. The quality depends on the scan; recognition runs on your device, so the speed depends on its power.
How do I merge several files into one PDF?
Open the "Merge PDF" tool, add the files, drag them into the right order and press "Merge PDF". Images are combined into one PDF by the "Images to PDF" tool - there you can choose the page size, orientation and margins.
Which font format is best for a website?
WOFF2: it is the smallest and is supported by all modern browsers. Keep only the characters you need in the font to make the file even smaller.