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How to Use

Everything you need to know about PaperFit's PDF tools.

Updated March 11, 2026

Adjust Margins & Paper Size

Adjust PDF margins and paper size so documents print correctly the first time.

Instructions

  1. Upload your PDF by dragging it onto the upload zone or clicking to browse.
  2. Choose paper size from the right panel — A0 to A6, Letter, Legal, Tabloid, or Ledger.
  3. Set margins using a preset (Narrow, Normal, Wide) or enter custom values in centimeters.
  4. Review the live preview — what you see is exactly what will print.
  5. Compare before/after side by side using the Compare button.
  6. Download or Print directly from the app.

Additional PDF Tools

PaperFit now includes a broader editing and cleanup toolkit beyond the core workflow above.

Available Now

  1. Compress PDF — reduce file size with quality presets, DPI controls, and optional grayscale output.
  2. Rotate PDF — rotate single pages or whole documents with live preview.
  3. Crop PDF — trim page edges visually and apply the crop to one page or many.
  4. Organize PDF — reorder pages, duplicate them, insert blanks, and delete pages in a visual workspace.
  5. Watermark PDF — add text or image watermarks with placement, opacity, and range controls.
  6. Page Numbers — add numbering with multiple positions, formats, and skip rules.
  7. Protect / Unlock PDF — add passwords and permissions, or unlock files you have access to.
  8. Flatten PDF — convert forms and annotations into a static PDF.
  9. Privacy Scanner — inspect PDFs, Office files, and images for hidden metadata or privacy-sensitive data before sharing.
Tip: Enable Fit to Page when moving content to a larger paper (e.g. A4 → A3) to proportionally scale the content up. Use Remove blank pages to automatically strip empty pages.

Merge Multiple PDFs

Combine multiple PDF files into a single document.

Instructions

  1. Add files — drag and drop multiple PDFs, or click to browse and select them.
  2. Reorder files using the up/down arrows to control the merge order.
  3. Remove any files you don't need with the delete button.
  4. Click Merge PDFs and wait for the progress bar to complete.
  5. Download your merged PDF.

Split PDFs Into Pages

Extract page ranges or split a PDF into individual pages.

Instructions

  1. Upload a PDF file.
  2. Choose split mode:
    • Page ranges — specify ranges like 1-3, 5, 7-10
    • Every page — creates one PDF per page
    • Every N pages — split into chunks of N pages each
  3. Click Split PDF.
  4. Download individual files or use Download All.

Remove or Extract Pages

Select specific pages to remove or extract into a new PDF.

Instructions

  1. Upload a PDF — page thumbnails are generated automatically.
  2. Choose your action: Remove selected pages or Extract selected pages.
  3. Click pages in the thumbnail grid to select/deselect them. Use All, None, or Invert for quick selection.
  4. Click the action button to process.
  5. Download your new PDF.

Convert Images to PDF

Convert JPG, PNG, or WebP images into a PDF document.

Instructions

  1. Add images — drag and drop JPG, PNG, or WebP files (multiple at once).
  2. Reorder images with the up/down arrows — this controls the page order.
  3. Choose page size — A4, US Letter, or Fit to image (each page matches its image dimensions).
  4. Set orientation — Portrait or Landscape (not available in Fit mode).
  5. Click Convert to PDF.
  6. Download your new PDF.

Convert PDF Pages to Images

Convert PDF pages to high-quality JPG or PNG images.

Instructions

  1. Upload a PDF file.
  2. Choose format — PNG (lossless) or JPG (smaller file size).
  3. Select resolution — 72 DPI (screen), 150 DPI (standard), or 300 DPI (print quality).
  4. For JPG, adjust the quality slider (default 92%).
  5. Choose all pages or enter a custom range (e.g. 1-3, 5).
  6. Click Convert to Images.
  7. Click any image to download it, or use Download All.

General Features

1

Dark Mode

Click the moon/sun icon in the header to toggle between light and dark themes. Your preference is saved and synced across all pages.

2

Install as App

PaperFit is a Progressive Web App. On mobile, tap "Add to Home Screen" to install it. It works offline too.

3

Privacy Protection

All files are processed entirely in your browser. Nothing is ever uploaded to a server. Close the tab and your files are gone.

4

Clear Selected Local Data

Open Preferences → Privacy Controls to choose exactly what to clear: session data, saved tool drafts, export history, onboarding hints, and optionally preferences, theme, or analytics consent.

Browser Notes

Chrome and Edge generally provide the smoothest save and print flows. Safari and Firefox are supported, but some actions may behave differently.

Safari / iPhone: some downloads, especially PDF to Image exports, may use the native share sheet instead of a desktop-style direct download. That is expected and is often the most reliable save flow on mobile.

Keyboard Shortcuts

Available on the Fix Margins page:

Action Mac Windows / Linux
Download PDF ⌘ + S Ctrl + S
Print ⌘ + P Ctrl + P
Reset / New File ⌘ + Z Ctrl + Z
Previous Page ←
Next Page →

FAQ

Does the Margins tool reduce the number of pages?
Not directly. It adjusts margins, paper size, and layout — it doesn't combine or reflow content. The only way pages are removed is through blank page detection.
What about scanned PDFs?
They work, but since the content is image-based, margins are adjusted by cropping and re-centering. You'll see a warning banner when a scanned PDF is detected.
Will image quality be affected?
Text and vector graphics scale perfectly at any size. Image-based content (photos, scans) may lose sharpness when scaled significantly. The app warns you when this may happen.
Is my file safe?
Completely. Everything runs in your browser. Your files are never sent over the internet. Close the tab and they're gone.
Can I clear saved data without losing preferences?
Yes. In Preferences, use the Privacy Controls checklist and clear only the categories you want. Preferences and analytics consent remain unless you explicitly select them.
What browsers work best?
Chrome and Edge provide the best experience. Firefox works well too. Safari has some quirks with download and print dialogs.
Is there a file size limit?
For the Margins tool: 50 MB maximum, and documents over 300 pages will show a confirmation prompt. Other tools handle standard file sizes without issues.
Can I merge different page sizes?
Yes! The Merge tool preserves each page's original size. The result may have mixed page dimensions.
How do I report a bug or ask for help?
Email support@paperfit.app with the tool name, browser, device, and the exact error message if you have one.
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PaperFit · Updated March 11, 2026