FormatDogWorkspace
Combine multiple PDF documents into a single file in seconds. Everything happens locally in your browser — your files are never uploaded anywhere, so there's nothing to wait for and nothing to worry about.
No signup · No file limits · Files never leave your deviceSelect two or more PDF files from your computer or phone.
Merge them alphabetically by filename, or in the exact order you selected them.
Get your combined PDF immediately — processed entirely on your own device.
No. Unlike most free online tools that cap you at 2–5 operations per day, FormatDog has no daily limits and no file count restrictions — merge as many PDFs as you need.
No signup, no email, no account required. Just choose your files and merge.
No. Every PDF you merge is processed entirely inside your own browser using local JavaScript. Your files never leave your device — not even briefly.
Yes. You can merge them alphabetically by filename, or in the exact order you select them.
No. Merging preserves the original pages exactly as they are — no compression, no re-rendering, no quality loss.
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Pinch or use +/− to zoom, two fingers to pan. One finger to drag and redact.
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Drag the corner handles to resize the crop area, or drag the middle to move it.
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Detecting grid lines…
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Click any line of text to retype it. Pinch or use +/− to zoom.
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Highlight/Underline: drag a box over the text. Draw: drag to sketch. Note: tap once to place a comment.