Last updated: September 2026

About these PDF tools

The PDF tools on this page provide three common utilities in a single, simple interface: merging PDFs, compressing PDF file size, and converting PDF pages into JPG images. Each tool runs directly in your browser using JavaScript, without uploading files to any server.

This approach has a practical advantage. Because your files never leave your device, the tools work as well on slow connections as on fast ones, and there is no waiting for files to upload before processing starts. Privacy is also improved, since no copy of your document is stored anywhere.

The tools are intended for common everyday tasks rather than professional publishing work. For more advanced needs — such as fine-grained compression control, OCR, page rotation or content editing — a dedicated desktop application or a specialised PDF service may be a better fit.

How each tool works

Merge PDF

The merge tool accepts two or more PDF files, reads them in the order you select, and produces a single PDF containing all pages from all files. The original order of pages within each file is preserved.

Compress PDF

The compression tool rewrites the PDF using object streams, which can reduce file size without altering the visible content. The exact amount saved depends on how the original file was created.

PDF to JPG

The PDF to JPG tool renders each page of the PDF to an image and saves it as a JPG file. Pages that contain text are rendered as sharp images; pages that already contain images will look the same as they do in the original.

Why browser-based processing matters

Many online PDF tools upload your file to a remote server, process it there, and then offer it back for download. This works, but it has two practical drawbacks. First, the file leaves your computer, which is a privacy consideration for sensitive documents. Second, upload and download time can be significant for large files.

Browser-based tools avoid both of these issues. The processing happens using the same JavaScript engine that runs the rest of the page, and the file is read directly from your device. There is no network transfer and no server-side copy.

Because of this design, the tools remain usable even with limited connectivity, provided the page itself has already loaded. Once the page is open, no further network requests are needed to process a file.

Browser and device support

The tools rely on modern browser APIs that are widely supported. In practice, they work in recent versions of the following browsers.

Google Chrome (desktop and mobile).
Microsoft Edge (desktop and mobile).
Mozilla Firefox (desktop and mobile).
Apple Safari (desktop and mobile).
Opera and other Chromium-based browsers.

Older browsers, or browsers with JavaScript disabled, may not support one or more of the tools. Very large files may also be slow to process on devices with limited memory.

Practical uses

Merging several scanned pages into a single PDF.
Reducing the size of a PDF before attaching it to an email.
Extracting pages of a PDF as images for presentations or previews.
Creating thumbnails of a PDF for use on a website.
Combining invoices, receipts or reports into one file.

For repeated or bulk work, opening the dedicated page for each tool can be more convenient than using the combined page.

Limitations

Compression is lossless and may not reduce file size as much as some tools that re-encode images.
PDF to JPG produces one image per page. It does not combine pages into a single image.
Encrypted or password-protected PDFs may not be processed.
Very large files may exceed the memory available on some devices.
The tools do not perform OCR, editing or content extraction.

Frequently asked questions

Are my files uploaded to a server?

No. The tools read your files directly in the browser and process them using JavaScript. Your files are not sent to any server.

Is there a file size limit?

There is no fixed size limit, but very large files may be slow to process on devices with limited memory. If a file is unusually large, processing it on a desktop computer rather than a phone or tablet is advisable.

Why is my compressed PDF not much smaller?

Compression works by rewriting the internal structure of the PDF. If the file already uses efficient structure, or if most of its size comes from embedded images, further compression may only reduce the file by a small amount. Reducing image quality usually requires image re-encoding, which this tool does not perform.

Does PDF to JPG work with scanned PDFs?

Yes. Scanned PDFs are rendered as images, so the resulting JPGs will look the same as the scanned pages. The tool does not attempt to recognise or extract text from the images.

Can I use these tools on my phone?

Yes. The interface is responsive and the tools work on most modern mobile browsers. Processing very large files on a phone is not recommended, since memory is usually more limited than on a desktop.

Are these tools free?

Yes. All three tools are free to use and do not require an account or registration.

Important information

These PDF tools are provided for general informational and personal use. They process files using the resources available in your browser, and they do not provide legal, financial or professional advice.

Always keep an original copy of any important file before processing it. Although the tools are designed to preserve content faithfully, PDF processing always involves rewriting the file structure, and rare cases of incompatibility can occur with unusual or non-standard PDFs.

If a document is encrypted or password-protected, remove the protection in a trusted PDF application before using these tools on it.