About the Web Optimize PDF
Tezmy's Web Optimize PDF tool prepares a PDF for putting on a website or sharing by link. It turns on fast web view (also called linearization), which reorganises the file so a browser or PDF app can show the first page while the rest is still downloading. At the same time it packs the file's internal structure into compressed object streams, which often makes it a little smaller. Text, pictures and quality are not changed, and you see the size before and after. It runs in your browser, so your file is never uploaded.
Updated September 2026
How to use the Web Optimize PDF
- 1Click Select PDF file, or drop your PDF on the page.
- 2Click Optimize for web.
- 3Check the size before and after.
- 4Download the web-optimized PDF and upload it to your site.
When to web-optimize a PDF
- Before uploading menus, brochures, catalogues or price lists to a website.
- For long reports, manuals and e-books that people open from a link.
- For PDFs shared from cloud storage or an intranet that visitors open in the browser.
- When a PDF on your site feels slow to show anything on mobile connections.
What the tool does
It uses qpdf, a widely used open-source PDF library, running in your browser. First it linearizes the file: the objects needed for page one are moved to the front and an index of every page is added, so a viewer can request just the parts it needs. Then it gathers the many small internal objects into compressed object streams and recompresses page contents with the strongest zlib setting.
After optimizing, the tool checks that the new file really is linearized before you can download it, and shows the size before and after so you can see the difference.
Getting the smallest, fastest file
- Shrink first: run the PDF through Compress PDF, which reduces picture sizes, then web-optimize the result.
- Remove pages nobody needs with Delete PDF Pages before publishing.
- Optimize last: editing a PDF afterwards (for example adding a watermark) can undo fast web view, so run this tool again after changes.
- Keep the original too, in case you need to edit it later.
What doesn't change
Web optimizing is a lossless reorganisation. Pages, text, fonts, pictures, links, bookmarks and form fields are kept exactly. That also means it can't shrink large photos or scans; that's what Compress PDF is for.
On a phone or computer, and private
The tool works in any modern browser on Windows, Mac, iPhone, Android and Chromebook, with nothing to install. The PDF is processed on your device and never uploaded, so you can safely prepare documents before they go public.
Features
- Fast web view (linearization)
- Compressed object streams
- Shows size before and after
- Text, images and quality unchanged
- Tells you if a PDF is already optimized
- Private: files never leave your device
Frequently asked questions
What does web optimize (linearize) mean?
Normally a PDF app needs the whole file before it can show anything. A linearized PDF puts everything needed for the first page at the start of the file, plus an index of where each page is, so the first page can appear while the rest downloads. Adobe calls this Fast Web View.
Will my PDF open faster?
When it's opened from a website, usually yes, especially for long documents on slow connections. It depends on the web server supporting partial downloads (most do) and on the viewer using them. Opened from your own computer or phone, a PDF is already local, so you won't notice a difference.
Does it make the PDF smaller?
Often a little, because the file's structure is packed into compressed object streams and page contents are recompressed at the highest level. Pictures aren't touched, so the saving is usually modest. For a big reduction, use Compress PDF first, then optimize the result for the web.
Why did my file get bigger?
Fast web view adds a small index (hint tables) to the file. If the PDF was already compact, that index can make it a few kilobytes bigger. It still opens faster online.
Does it change how my PDF looks?
No. Only the way the file is organised changes. Text stays selectable, pictures keep their quality, and links, bookmarks and form fields keep working.
How do I check if a PDF has fast web view?
Drop it in here: the tool tells you if it's already set up for fast web view. In Adobe Acrobat or Reader you can also see it under File > Properties, where Fast Web View shows Yes or No.
Can I optimize a password-protected PDF?
Not directly. Remove the password with Unlock PDF first, optimize it here, and protect it again with Protect PDF if needed.
Is my file uploaded?
No. The optimizer (qpdf, about 1.4 MB) is downloaded from our site the first time and runs in your browser. Your PDF never leaves your device.