About the PDF tools
These five tools cover the common things people need to do with PDFs: build one from photos, join several into one, take pages out, shrink a heavy file and turn pages into pictures. They run in your browser using two open-source libraries, pdf-lib for building and editing documents and Mozilla’s pdf.js for drawing pages, so your documents stay on your device.
They help with job applications, forms that ask for a single PDF, scanned paperwork and email attachments that are over the size limit.
Which tool to pick
To put photos or scans into a document, use JPG to PDF, which places one image per page on A4, US Letter or pages sized to each picture. To combine existing files, Merge PDF joins them in the order you set. Split PDF does the reverse, pulling out a page range or cutting a document into single pages or equal chunks. Merging and splitting copy pages as they are, so text stays selectable.
The other two turn pages into images. Compress PDF rebuilds every page as a JPG, which can shrink scans a lot but makes text unselectable, so hold on to your original. PDF to JPG saves pages as separate pictures at 72, 150 or 300 DPI. The tools that open PDFs can’t read password-protected files, so remove the password first.