Resize PDF - PDF Resizer: Change Page Size & Reduce File Size

Resize PDF pages to A4, Letter or a custom size and reduce PDF file size. Batch, free, files never leave your device.

Resize PDF is a free Chrome extension that changes the page size of a PDF or makes the file smaller, in the browser side panel. Your contracts, scans and invoices are processed on your computer and never reach a server. The steps below show how to make a PDF small enough for email or change its page size for printing. 🔰 How to use Resize PDF 1. Click the extension icon in the Chrome toolbar to open Resize PDF in the side panel. 2. Drag and drop PDF files into the panel or press Select PDFs. Add one document or a batch. 3. Open the File size tab to compress PDF files, or the Page size tab to change the paper format. 4. Pick a quality level, a target size in megabytes, a paper size or a scale percentage. 5. Press Compress or Resize and check the before and after size next to each file. 6. Download a single result, or press Download All to save the batch as one ZIP archive. 7. Press Open in tab to work in a full browser tab for a long list. ℹ️ Resize PDF is free to use with every feature unlocked from the first launch. There is no trial period, sign-up form or watermark, and no limit on files or pages. 👍 Top 🔟 reasons to choose Resize PDF 1️⃣ The PDF engine runs inside Chrome. There is no file transfer to a remote server and no wait in an upload queue. 2️⃣ Change the paper format of the pages or reduce the file size in the same panel. 3️⃣ Page resizing rescales the vector content instead of turning pages into pictures, so text remains sharp, selectable and searchable. 4️⃣ Target size mode. Type a limit such as 2 MB and the extension looks for the highest image quality that still fits. 5️⃣ Three quality presets. Low gives the smallest file, Medium is the balanced default, and High keeps photos closest to the original. 6️⃣ Standard and custom paper. Choose an ISO or US format from the list, or enter your own width and height in millimeters or inches. 7️⃣ Orientation and margins. Let each page keep its own orientation or force portrait or landscape, then add white margins around the content. 8️⃣ Hyperlinks, highlights and other annotations move with the page and match the new layout. 9️⃣ Process dozens of files with one click and save everything in one ZIP archive. 🔟 When a file cannot get smaller, you keep the original and see a short reason instead of a larger or broken copy. ❓ Why would you need Resize PDF? ✅ A mail server rejects your 30 MB attachment and the scan has to fit under the limit in a minute. ✅ A job portal, a university application or a government form only accepts PDF uploads of 2 MB or less. ✅ A US Letter contract must be printed on A4 paper in Europe without clipped edges or a shrunken corner. ✅ Your scanner saved pages at odd dimensions and the print shop asks for a standard sheet. ✅ A handout needs to be scaled down to 80% to leave room for handwritten notes in the margins. ✅ You are a lawyer, accountant or HR manager, and company policy forbids uploading client documents to online converters. ✅ You are a student whose merged lecture scans are too large for the course portal. ✅ You are a real estate agent whose photo-heavy brochures bounce back from client inboxes. ✅ A clerk has to attach a signed scan to an online claim that refuses anything above 1 MB. ✅ A teacher prints worksheets that were designed on Letter paper, while the school copier only holds A4. ✅ A designer exports large A3 proofs and needs lighter A4 copies that a client can open on a phone. ✅ An office manager archives years of scanned receipts and wants the folder to take less disk and cloud storage space. ✅ You travel or work on a weak connection: after installation, the extension keeps working offline. ❓ Frequently Asked Questions: ❔ How do you reduce PDF size? 💡 The fastest way to make PDF size smaller is to deal with what fills the file: most of the weight in a large PDF comes from embedded photos and scanned pages. Resize PDF re-encodes those images as JPEG at the quality you choose and leaves fonts, text and vector drawings as they are. In target mode it can also lower the pixel dimensions of oversized images when quality alone is not enough. Small icons and decorations are skipped, because recompressing them would save almost nothing. A logo repeated on every page is stored once in most files; Resize PDF processes that shared copy only once. ❔ Why can't I reduce my PDF file size? 💡 Three common reasons: a text-only document has no images to shrink. An already optimized file has little left to compress. Some scans store pages as fax-style black and white images or as JPEG 2000, which a browser cannot safely re-encode. In each case the extension keeps your original file and labels it with the reason. ❔ How to reduce PDF size to 300 KB? 💡 Open the File size tab, switch to Target size and enter 0.3 MB. Resize PDF tries lower quality steps and, if needed, smaller image dimensions until the file fits. If 300 KB is out of reach, the result line shows the smallest size it achieved next to your target. ❔ How to change PDF size to A4? 💡 To change the PDF page size, open the Page size tab, choose Paper size and select A4. Then press Resize. Each page is scaled to fit the new sheet and centered on it, so nothing is cropped. US Letter is the 8.5 x 11 inch preset, and other presets cover both ISO and US paper, from the small A5 up to Tabloid. ❔ How do I set up page margins in a PDF? 💡 Enter a margin value in the Page size tab before you press Resize. The content is scaled to fit inside the margin on every side, which helps when a printer cannot print to the edge or when you need room for binding, hole punching or stamps. The panel warns you when the margins are too large for the chosen sheet. ❔ How to change PDF pages or reduce PDF size without losing quality? 💡 Changing the page size rescales the page mathematically, like zooming, without losing quality or creating new pixels. Reducing file size recompresses photos, which can lower their quality. To reduce PDF size while photos stay closest to the original, pick the High preset in Resize PDF for print, or Medium for reading on a screen. ❔ Can I resize a PDF on a Mac or a Chromebook? 💡 The extension runs wherever desktop Chrome runs, so it works on Windows and macOS computers as well as on Linux and Chromebooks. You do not need Adobe Acrobat or Preview, and the result is the same on every system. ❔ Is there a limit on the page size or on file size? 💡 Custom width and height accept values up to 200 inches (5080 mm), the largest page side that common PDF viewers can open. There is no fixed limit on file size, but very large scanned images above 64 megapixels are left untouched so the browser stays responsive. ❔ Can I resize the images inside a PDF? 💡 Yes, as part of compression. In Target size mode, when a lower quality setting is not enough, the extension shrinks oversized photos in steps to 75%, 50% and then 35% of their pixel dimensions. The long side of an image never drops below 64 pixels. Images that rely on a color-key mask are left untouched, because JPEG would shift the exact colors the mask depends on. ❔ Can I scale a PDF by percentage instead of picking a paper size? 💡 Yes. Switch the Page size tab to Scale % and enter any value from 10% to 400%. 100% keeps the original size, 50% halves the width and the height, and about 141% turns an A4 page into A3, because ISO sheets grow by the square root of two from one size to the next. Scaling keeps the proportions of every page. ❔ How do I check the size of a PDF before and after? 💡 When you add files, Resize PDF lists each file's size and number of pages. After processing, each line shows the old and new size side by side, and a total line sums up the batch before you download. ❔ What if I change the settings after processing? 💡 The finished results stay in the list, and the panel shows a hint that the settings changed. Press Compress or Resize again to rebuild the files with the new values. A long batch can be interrupted at any time with the Stop button. ❔ Is it safe to use with confidential documents? 💡 The extension asks Chrome for one permission: to open in the side panel. It cannot read the pages you browse and has no account to sign in to. The PDF engine is packaged inside the extension, not loaded from the internet. Your documents are read from your disk, processed in memory and come back as downloads, so they stay secure on your own computer. ❔ Does it change my original file? 💡 No. The source PDF on your disk stays exactly as it was. Each processed document is saved as a new file through the Chrome download, so you can compare both versions and keep the one you need. ❔ Can I resize a password-protected PDF? 💡 Files with password protection are detected and marked in the list with a note. Remove the password first, then add the unlocked copy to Resize PDF and process it. If you have any questions, problems, or feature requests, please contact us. Install it now!