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File PDF is a browser-based toolkit for PDF tasks including converting, merging, compressing, splitting, editing, signing and protecting files. The site states that processing happens client-side, so documents remain on the user's device and are not uploaded to a server. It also describes no signup requirement, unlimited use and batch processing.
Sejda is an online PDF service offering an editor and over 30 PDF tools, including merging, splitting, compressing, cropping, filling and signing, and converting PDFs to images or Word. It works online or offline, in the cloud or as a desktop application, with no installation required. Developer documentation covers an HTML to PDF API and 'Save as PDF' links for websites.
Stirling PDF is an open-source PDF editing platform that can run as a desktop app, in the browser or on self-hosted servers with a private API. It offers over 50 tools covering editing, merging, splitting, signing, redaction, conversion, OCR and compression, plus automation pipelines and REST APIs. The interface is available in 40+ languages.
2pdfconverter.com is an online PDF conversion and editing toolkit. It converts Word, Excel and PowerPoint documents to PDF, and converts PDF to Word, text, JPG and HTML. It also offers signing, rotating, merging, splitting and shrinking PDFs. The service is free, files are removed from the server after conversion, and converted files remain downloadable for 1 hour.
Adobe Acrobat's online tool fills PDF forms and adds electronic signatures. You can type, draw or upload a signature, then download the completed document.
DigiPDF by La Digitale is a collection of tools for organizing, editing and converting PDF files, built on the free Stirling-PDF service. It groups functions for viewing and editing, merging, splitting, compressing, converting to and from PDF, and signing and securing documents.
Collection of free web-based tools for editing, converting, merging, splitting, compressing and otherwise manipulating PDF files. Processing happens in the browser with no installation required. Categories cover organizing PDFs, converting to and from PDF, signing and security, and viewing and editing, including OCR cleanup of scans.
DocuSeal is an open source platform for digital document signing and processing. It provides a PDF form fields builder and lets PDF forms be filled and signed online on any device through a mobile-optimized web tool.
MuPDF is a software library for managing PDF and other document formats, with bindings including PyMuPDF, MuPDF.js and MuPDF.NET. Its stated tasks include extracting content, rendering, merging, splitting, editing, signing, viewing, annotating, redacting and optimizing PDF files.
BentoPDF is a free, open-source online PDF toolkit that processes files locally in the browser using WebAssembly, so files are not uploaded. It offers over 100 tools for merging, splitting, compressing, converting, editing, annotating, signing and filling PDFs, and is described as self-hostable with offline OCR.
Open source document signing platform for forms, PDFs, templates, and e-signature workflows.
itinypdf is a browser-based collection of PDF tools offered free with no watermark or account. It includes merging, compressing, splitting, converting, signing and editing PDFs, with tools for organizing pages, locking and unlocking files, and adding watermarks or page numbers. The site states that files stay on the user's device and are not uploaded to servers.
PrintFriendly is a set of online tools for editing, signing, compressing, converting, merging and splitting PDFs, and for removing ads and clutter from web pages before printing or saving them as PDFs. It also offers a browser extension, a WordPress plugin and a REST API that converts a URL or HTML into a clean PDF.
