Apps similar to STDU Converter include PDFsam Basic, which is free and open source. Other options are Master PDF Editor, Sejda, Nitro PDF and Online Convert. PDF Editors like STDU Converter are a crowded field, with more than 25 alternatives for Windows, Mac, the web, Linux and Android.
PDFsam Basic is a free and open-source desktop application for splitting and merging PDF files. It runs entirely on your own computer, so your files are never uploaded anywhere and it works fully offline.
Italy
EU
Master PDF Editor is complete solution for editing PDF and XPS files. You can insert, edit, remove, copy, add images or graphics. Export, import, remove and change page layouts. Also Master PDF Editor provides full functionality for changing PDF information, including author...
Russia
Sejda helps with your PDF tasks: edit existing text, split, merge, extract, compress, export to other formats and more.
NetherlandsEU
Nitro offers comprehensive PDF solutions for editing, creating, and converting, alongside OCR and e-signature tools. Supports Mac, Windows, and iOS, providing a user-friendly interface with industry-standard security features. Ideal as an Adobe Acrobat alternative.
United States
Convert files like images, videos, documents, audio and more to other formats with this free and fast online converter.
GermanyEU
ClarifyDocuments is a free AI tool that converts PDFs, images, and slides into clean, editable text. It automatically cleans, organizes, and processes content in any language, helping students and educators focus on learning.
ItalyEU
Comprehensive solution for editing, signing, form filling, OCR scanning, commenting, converting, and redacting PDFs, with AI-driven analysis and content extraction, data export to spreadsheets, text-to-speech, seamless use across desktop and mobile, and batch processing.
Taiwan
Open-source PDF viewer and editor using Qt framework, featuring hardware-accelerated rendering, encryption, multithreading, text-to-speech, annotation tools, form filling, high-res monitor support, document compression, audio book conversion, and signature validation.
CzechiaEU
Tabula is a tool for liberating data tables locked inside PDF files. Extract tables from PDFs.
United States
Cloud PDF toolkit provides over 20 tools for editing, conversion, OCR, merge, split, annotation, batch processing, and signatures, with free online access, cross-platform usability, no watermarks, no size limits, and options for mobile and desktop integration.
Hong Kong SAR China
Comprehensive cross-platform PDF suite enabling accurate conversion from native or scanned files to Word, Excel, PowerPoint, and AutoCAD, with OCR support, document editing, annotation, redaction, interactive forms, table customization, batch creation, secure signing, and multilingual UI.
United States
Free online conversion service. Possible to determine unknown file format too.
Thats a pretty catchy selling point in itself—you can convert PDFs to Excel files, huge TIFF images to PDF, icon files into images, and the site even does a little OCR work on certain image-to-text co.
Canada
