How it works
Five steps, all in your browser.
Pick a tool, add a file, set the options, run it, check the result, then download. Everything happens in your browser.
1. Add a file
Open a tool such as Merge PDF or PDF to JPG and drop your file on the page, or choose it from your device. You can also open the workspace first and pick a tool afterwards.
Adding a file never changes it. Deckle reads the file, counts its pages and draws thumbnails so you can see what you are working on. Nothing is rewritten until you press the tool's button.
- Most tools take one PDF. Merge takes two or more, and the image tools take one or more JPG, PNG, HEIC or TIFF files.
- If a file cannot be read, Deckle says why and leaves it untouched.
2. Set the options
Each tool shows its own controls next to a preview of the real pages: page ranges for Split, page order for Organise, resolution for PDF to JPG, a password for Protect.
A short sentence under each group of options restates what is selected, such as "3 PDFs will merge in the listed order", so you can read the plan before you run it.
Tools that let you edit pages have Undo, Redo and Reset. Limits, such as the formats a tool accepts, are shown next to the control they affect.
3. Run the tool
The button names the job: "Merge PDFs", "Split PDF", "Protect this PDF". It stays disabled until the tool has what it needs, and the text beside it tells you the next step, for example "Open a second PDF to merge with this one."
While the tool runs, the progress panel lists each step and keeps finished steps on screen. You can cancel at any point; the original file is not affected.
4. Check the result
When the output is ready, Deckle reopens it and checks it before you download. The checks depend on the tool. A merge counts the pages; a conversion confirms each image opens; a password tool confirms the file now asks for a password.
Where it applies, Deckle also compares the text it can extract before and after, and compares rendered pages to catch visual changes. A scanned page with no selectable text is reported as "no selectable text to compare" rather than as a pass.
The result shows a headline such as "24 pages combined" and one line of measured facts. These checks run on your device. They are a useful second look, not a certificate.
5. Download or keep going
Download the result as a PDF, an image, a text file or, when a tool produces several files, as one ZIP. The original stays as it was.
You can also carry on with the result in another tool without downloading it first: compress the merged file, or protect the split part. Each step creates a new version, and you can go back to the original at any time.
Files you leave open
Open documents are kept in your browser's private storage for this site, so a page reload does not lose them. This is a convenience, not a backup: the browser can clear site storage, for example when space runs low or when you clear browsing data.
Download anything you want to keep. Closing a document removes it from browser storage. If it has results you have not downloaded, Deckle asks first.
What you need
A current version of Chrome, Edge, Firefox or Safari on a computer, tablet or phone. No install, no account and no plug-in.
Everything runs on your device, so speed and the largest file you can handle depend on its memory and processor. Very large PDFs, high-resolution image exports and OCR on many pages take longer on phones than on a desktop.
Tools marked Beta work but have a narrower set of supported files. Their pages list the limits. Check a Beta result before you rely on it.