Find answers to common questions about MarsPDF, our online PDF tools, file processing, privacy, security, and supported features.
General Questions
What is MarsPDF?
MarsPDF is a free online PDF tools platform that helps users merge, split, compress, convert, rotate, protect, unlock, edit, sign, and manage PDF files directly in the browser.
Do I need to install any software?
No. MarsPDF works directly in your browser. You do not need to install any software, browser extension, or mobile application to use our PDF tools.
Is MarsPDF free to use?
Yes. MarsPDF provides free online PDF tools for everyday document tasks. Some advanced features, larger file limits, or batch processing options may be added in the future.
Can I use MarsPDF on mobile?
Yes. MarsPDF is designed to work on desktop, tablet, and mobile browsers. You can use our tools from Windows, macOS, Linux, Android, and iOS devices.
File Upload and Processing
What types of files can I upload?
Supported file types depend on the selected tool. For example, PDF tools usually accept PDF files, while image conversion tools may accept formats such as JPG, PNG, or other supported image files.
How long does file processing take?
Most files are processed within a few seconds. Larger files, complex documents, image-heavy PDFs, or OCR-related tasks may take longer depending on file size and server load.
Why did my file fail to process?
A file may fail to process if it is corrupted, password-protected, too large, unsupported, or contains complex elements that cannot be processed correctly by the selected tool.
Will the result always look exactly like the original file?
MarsPDF aims to keep documents accurate and high quality, but some conversions, compression results, OCR outputs, or layout changes may not be perfect for every file. We recommend reviewing the processed file before using it for important purposes.
Privacy and Security
Are my uploaded files safe?
File privacy is one of our top priorities. Uploaded files are processed only for the selected tool and are not used for unrelated purposes.
When are my files deleted?
Uploaded files and processed output files are automatically deleted from our servers within 1 hour after processing.
Does MarsPDF manually review my files?
No. MarsPDF does not manually review the contents of uploaded documents. Files are handled automatically by our processing system.
Does MarsPDF share my files with third parties?
No. We do not sell, rent, or share uploaded user documents with third parties. Some trusted third-party services may be used for hosting, analytics, advertising, security, or performance, as explained in our Privacy Policy.
Is the connection secure?
MarsPDF uses secure HTTPS connections to help protect data transferred between your browser and our servers.
PDF Tools
Can I merge multiple PDF files?
Yes. You can use the Merge PDF tool to combine multiple PDF files into one document.
Can I split a PDF into separate pages?
Yes. The Split PDF tool allows you to separate pages or extract selected pages from a PDF document.
Can I compress a PDF file?
Yes. The Compress PDF tool helps reduce PDF file size, which is useful for email attachments, online forms, and document uploads.
Can I convert images to PDF?
Yes. MarsPDF can help convert image files such as JPG or PNG into PDF documents, depending on the available tools.
Can I convert PDF files to images?
Yes. PDF to JPG or PDF to PNG tools can convert PDF pages into image files.
Can I protect a PDF with a password?
Yes. The Protect PDF tool can help add password protection to a PDF file.
Can I unlock a password-protected PDF?
MarsPDF may allow users to unlock PDF files only if they have the legal right and password or authorization to access the document.
Account and Limits
Do I need an account to use MarsPDF?
No account is required for basic PDF tools. If user accounts, premium plans, or advanced features are added in the future, they will be clearly explained on the website.
Are there file size limits?
Some tools may have file size limits to keep processing fast, secure, and stable for all users. Larger file limits or batch processing may be added as advanced features in the future.
Support
How can I contact MarsPDF?
If you have questions, feedback, bug reports, feature requests, or privacy inquiries, you can contact us through our Contact Us page.
Can I suggest a new PDF tool?
Yes. We welcome suggestions for new PDF tools and improvements. You can send your ideas through the Contact Us page.