Merge form fields and annotations into the page so they cannot be edited or altered.
Max 250MB
Flatten PDF is a free online tool from HuntPDF. Flatten PDF form fields and annotations into static, non-editable content. Free, no signup. You work straight from your browser — there is nothing to install, no account to create and no watermark on the result. Upload a file up to 250MB, the processing happens on our secure servers, and your document is deleted automatically once you have your result.
Drag and drop the PDF you want to process, or click to browse for it.
Pick the option that suits the job. The defaults are tuned to give a good result without you having to think about it.
Your optimised PDF is ready to download in seconds — no watermark, no signup.
No signup, no watermark and no daily cap. Use it as often as you need.
Files travel over an encrypted connection and are deleted the moment your download finishes.
Runs in any modern browser on Windows, macOS, Linux, Android and iOS.
Most files are processed in a few seconds on our servers, not your laptop.
Flatten PDF is a free online tool from HuntPDF. Flatten PDF form fields and annotations into static, non-editable content. It runs from your browser — you upload a file, the work happens on our servers, and you download the result. There is nothing to install and no account to create.
Upload your file using the box above — drag it in, browse for it, or bring it in from your cloud storage. A preview appears so you can check you've picked the right file. Run Flatten PDF, then download the result. You can rename it before you save it.
Yes. The file you send to Flatten PDF travels over an encrypted HTTPS connection and is processed automatically on our servers. It is never made public, never shared with anyone, and nobody reads it.
No. Your upload is deleted the moment Flatten PDF finishes with it, and the file it produces is removed as soon as you have downloaded it, or when you upload another file, or when you close the page. Nothing is kept, and nothing is used to train anything.
Yes. Flatten PDF is built to leave your content exactly as it is — only the change you asked for is applied. Nothing else about the file is altered or re-compressed.
Yes. Flatten PDF runs entirely in your browser, so it works on any modern phone or tablet — iPhone, iPad or Android — with nothing to install. You can upload straight from your device or from your cloud storage.
Yes. The file Flatten PDF gives you back keeps the name of the file you uploaded by default. If you'd rather call it something else, edit the name in the field next to the download button before you save it.
No. There is nothing to download, install or sign up for — Flatten PDF runs in your browser and does the work on our servers, so it behaves the same on Windows, macOS, Linux, Android and iOS.
Most files are finished in a few seconds. A large or page-heavy file takes a little longer, because Flatten PDF runs on our servers rather than on your device — but you won't be waiting around. You can upload files up to 250MB.
Yes. Flatten PDF is free, with no signup, no watermark on the result and no daily limit for normal use.