PDFescape
pdfescape.com
The 2007 browser PDF editor that still fills awkward government forms
sejda.com
Actually edits the text inside a PDF, not just annotations on top.
Most so-called PDF editors let you draw a text box over the page; Sejda re-flows the existing text, so a typo in the middle of a paragraph can be corrected in place. It also handles the usual merge, split, fill, sign and compress work, and offers a desktop build that processes files locally. The free web tier is metered by the hour rather than the day.
Questions
A genuinely usable free tier with paid plans for volume or team features. Free use allows only a few tasks per hour, on documents of roughly 50 MB or 200 pages.
Yes. Sejda PDF sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
Free use allows only a few tasks per hour, on documents of roughly 50 MB or 200 pages.
Alternatives
Same category or same task, ordered by how closely they overlap.
pdfescape.com
The 2007 browser PDF editor that still fills awkward government forms
acrobat.adobe.com
Adobe's own PDF tools, free for about a job at a time
dochub.com
Fills in a PDF form and signs it without printing anything
smallpdf.com
The tidiest PDF suite, rationed to a couple of jobs a day
stirlingpdf.io
Fifty PDF tools you can also run on your own machine in Docker
xodo.com
Reads and annotates a PDF properly, then merges or converts it