Frequently Asked Questions
Find answers to common questions about our PDF and image tools.
General Questions
Is PDFCompiler.com really free?
Yes! All our core PDF and image tools are completely free to use. There are no hidden fees, no subscription required, and no limits on how many files you can process.
Do I need to create an account?
No, you don't need to create an account or sign up. You can start using all our tools immediately without any registration.
Is my data safe and private?
Absolutely! All file processing happens directly in your browser. Your files are never uploaded to our servers. Once you close the browser tab, your files are gone - we never store them.
PDF Tools
How do I compress a PDF to under 100KB?
Upload your PDF to our Compress PDF tool, select the compression level (higher compression for smaller files), and download the compressed result. For very large PDFs, you may need to use maximum compression.
Can I merge multiple PDF files?
Yes! Use our Merge PDF tool to combine multiple PDF files into one. Simply upload your files, arrange them in the order you want, and click merge.
How do I split a PDF into separate pages?
Use our Split PDF tool to extract specific pages or split the document into individual pages. You can select which pages to extract or split at specific intervals.
Can I edit text in a PDF?
Our Edit PDF tool allows you to add text, shapes, and annotations to PDFs. For full text editing, we recommend converting the PDF to Word first, editing, then converting back to PDF.
Image Tools
What image formats are supported?
We support all major image formats including JPG/JPEG, PNG, WebP, GIF, and more. Our converter can transform between these formats easily.
How do I compress images without losing quality?
Our Compress Image tool uses smart compression algorithms that reduce file size while maintaining visual quality. You can adjust the compression level to balance size and quality.
Can I resize images to specific dimensions?
Yes! Our Resize Image tool lets you specify exact pixel dimensions, scale by percentage, or choose from preset sizes for social media, documents, and more.
How do I create passport size photos?
Use our Passport Photo tool to automatically crop your photos to standard passport dimensions (3.5x4.5cm or 600x600px). The tool guides you to position your face correctly.
Technical Questions
Why is processing done in the browser?
Browser-based processing means your files stay on your device. This provides maximum privacy and security - we literally cannot see your files because they're never sent to us.
What browsers are supported?
Our tools work on all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. We recommend using the latest version of your browser for the best experience.
Is there a file size limit?
Since processing happens in your browser, limits depend on your device's memory. Most devices can handle files up to 100MB easily. For very large files, try processing in smaller batches.
Can I use these tools on mobile?
Yes! All our tools are fully responsive and work on smartphones and tablets. The interface adapts to your screen size for easy mobile use.