Fix a PDF without starting over. Click a line and type: the change keeps the document's own font, and the old words are removed, not hidden under a white box. Then sign it, sign with your own digital certificate, or send it to a few people and watch each signature come in. You can also check if a signed PDF was changed later. Merge, compress, convert, OCR and redact too, no account needed. Works in the browser, on Windows (offline editing) and Android.