Frequently asked questions

Are my files uploaded?

No. PDFs and images are processed inside your browser on your device. Your files, their names and what is in them are not sent to JikTools. The PDF engine itself, the programs that read and write PDFs, is a set of files of this website that your browser downloads like any other page file.

Which images can I put into a PDF?

JPG, PNG, WebP and AVIF. WebP and AVIF are saved as JPEG inside the PDF. HEIC photos cannot be added directly: convert them to JPG first with the HEIC to JPG tool of JikImage. Animated images and some JPG types, for example CMYK, are not supported.

Why did a large file fail?

Everything runs in your browser with your device's memory. Very large files, many pages or high-resolution page images can run out of memory. Try fewer or smaller files at a time, or a lower resolution (dpi) for page images.