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You're in good company:
Zamzar has converted and compressed over 510 million files since 2006
Compress to different file sizes
You can use Zamzar to process a wide range of different files - just click on a format to get started:
Why compress PDFs to 500kb
PDF files have a tendency to grow larger than you'd expect, especially if they contain images, scanned pages, or a mix of text and graphics. This can become a problem when you need to share them, as many email providers and online platforms set upload limits that your file might easily exceed. Slow uploads, failed submissions, and error messages are all common frustrations when dealing with oversized PDFs, and they can hold you up when you're trying to get something done quickly.
Compressing a PDF to 500KB gives you a generous amount of space to work with, which means you can keep images and visual elements looking sharp while still bringing the overall file size down to something more practical. This makes it a good fit for longer or more image-heavy documents, like a photography portfolio, a property brochure, or a multi-page project report with diagrams and charts. Zamzar's online PDF compressor takes care of the process for you: upload your PDF, and you'll be able to download a smaller version shortly after. It's a straightforward option whether you're a small business owner sending a brochure to a potential client, a student submitting a project with visual elements, or simply trying to keep your files at a reasonable size for cloud storage.
Highly Reputable
Zamzar was used by the creator of PowerPoint to help him convert a very old PowerPoint into something that could be opened.
Highly Reliable
People trust us to do their file conversions because we've been doing it to a high standard for over 10 years.
Very Experienced
Having launched in 2006, we’ve spent a long time refining our process so that converting files with us is seamless, quick and completely pain-free.
Dedicated Support
As well as a support team, we also have a page of FAQs and a catalogue of videos to assist you should you run into an issue.