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Short answers about the tools, your files, your account and Premium.
Open a tool, check the preview, then download the result.
Open the tool, such as stackpdf.com/compress, or drop a file on the home page and pick a tool. Choose your settings, check the preview, then download the result or keep it in My files.
Most tools take PDFs. JPG to PDF takes JPG, PNG and WebP images. Word, Excel and PowerPoint to PDF take Office files, and Text and CSV to PDF take .txt and .csv files. HTML to PDF starts from a web address or pasted HTML.
No. StackPDF runs in current versions of Chrome, Safari, Edge and Firefox, on a computer or a phone.
No. Results never get a watermark, on the free plan or with Premium.
Yes, if you know the password. The tool asks for it before it opens the file, and Remove password from PDF saves a copy without it. StackPDF can’t remove a password you don’t know.
Most tools never upload your file. The few that do say so first.
Not for the tools that run in your browser. They open and process the file on your device, so it never leaves it. Office conversion, OCR and HTML to PDF run on our servers as part of Premium. They ask before anything is uploaded, and the file is deleted after the job, within a day at most.
Convert PDF to PDF/A, PDF to Word, PDF to Excel, PDF to PowerPoint, PDF to CSV, Word to PDF, Excel to PDF, PowerPoint to PDF, HTML to PDF and OCR PDF. They are part of Premium, and each one asks before it uploads your file.
Only for the job. The file and the result are deleted once you have the result, and anything left over is removed within a day at most.
With Premium and a signed-in account, uploaded files are stored in your cloud library after server confirmation. Wait for Synced before relying on another browser. Older browser-only files stay on their original device until you explicitly import them; signing in alone does not upload them.
Tools that run in your browser have no fixed limit, but very large files depend on your device’s memory. Cloud tools take 50 MB for documents, 25 MB for images and 512 KB of HTML.
Keep the PDFs you work on, sorted into folders.
My files keeps the PDFs you add or make with a tool, so you can open them again in any tool without choosing the file each time.
Folders sort the PDFs in My files, such as Invoices or Contracts, so you can find a file by name and open it in another tool in one click. With Premium, My files holds up to 1,000 MB. Uploaded files and folders are available in browsers signed in to the same account after server confirmation. Older browser-only files need an explicit import. Deleted files can be restored for 30 days.
Premium includes 1,000 MB, and each file can be up to 100 MB to sync. Larger files stay in the browser where you saved them.
Yes. Deleted files go to Recently deleted, where you can restore them for 30 days. After that they are removed for good.
With Premium, sign in to StackPDF in your phone’s browser using the same account. Cloud folders and files are available after upload is confirmed as Synced. Older browser-only files need an explicit import first.
Free tools need no account. Premium needs one on the web.
No. Every free tool works without an account. You sign in to get Premium, with Google, Apple or a link sent to your email. Use the same account in another browser to access your plan.
With Google, Apple or a link sent to your email. There are no passwords to remember, and your first sign-in creates the account.
Yes. Sign in with the same Google, Apple or email account in the browser on each device. A cloud file appears elsewhere only after its upload is confirmed.
Go to Account, then Settings, and choose Delete account. This deletes your account and your cloud library, including its folders. Files you already downloaded stay on your device. Cancel subscription renewal first: web subscribers can use Account, Billing, then Manage subscription. If you pay through the App Store or Google Play, cancel in that store.
Every tool has its own page with steps, settings and answers. Start from a category.