PDFNoLimit

PDFNoLimit performs the whole document pipeline on the client. Three WebAssembly engines are loaded into the browser tab: PDFium 2.15.0 for parsing and rendering, QPDF for encryption, decryption and repair, and ONNX Runtime Web (SIMD, multi-threaded) for neural inference. The page is cross-origin isolated, so the modules run threaded. OCR uses PP-OCR executed locally, with twelve script-specific models covering Arabic, Chinese, Cyrillic, Devanagari, Greek, Latin, Korean, Tamil, Telugu and Thai.

The editor modifies the text already present in a PDF rather than overlaying a box on top of it. The suite also covers merging, splitting, comparing, cropping, rotating, compression, repair, redaction, signing, watermarks, page numbers, metadata and conversion to and from Office formats and images.

No server ever receives a document, which anyone can verify by disconnecting the network and continuing to edit. Free and unlimited, no account, no watermark, 66 languages.