Five powerful PDF tools — 100% in your browser.
Compress, Merge, Split, convert Images to PDF, and export PDF pages as Images — all without uploading a single file. No servers. No accounts. No tracking. Everything runs locally on your device. Your files never leave your computer!
Reduce PDF file size by re-rendering each page as a compressed JPEG. Choose your quality level from 0.1 (smallest) to 1.0 (sharpest). Supports batch compression of multiple files at once.
🔗 Merge
Combine multiple PDF files into one. Add as many files as you need, drag to reorder them, then merge in a single click. The original page content and layout of each file is preserved — no re-rendering.
✂️ Split
Extract specific pages or page ranges from any PDF. Type ranges like 1-3, 5, 7-9 to get separate PDFs for each group, or split every single page into its own file.
🖼 Image → PDF
Turn a collection of JPEG, PNG, or WebP images into a single PDF. Add your images, drag to set the page order, and build. Each image becomes one page at its original pixel dimensions.
📷 PDF → Image
Export any PDF page as a JPEG or PNG image. Choose your scale (1× to 3×) and quality. Single pages download directly; multi-page PDFs are bundled into a ZIP — no extra software needed.
📄 How Compress Works
1
Select Your PDF
Click Choose Files and pick one or more PDF files. Multiple files are processed sequentially.
2
Set Quality Level
Drag the Quality slider. Lower = smaller file, higher = sharper image. Default 0.5 works well for most documents.
3
Pages Are Rendered
Each page is drawn to an invisible HTML canvas using PDF.js — entirely inside your browser, nothing leaves your device.
4
Images Are Compressed
Each canvas snapshot is exported as a JPEG at your chosen quality, reducing file size by discarding redundant image data.
5
PDF Is Rebuilt
Compressed images are reassembled into a new PDF using PDFKit, preserving original page dimensions.
6
Download Instantly
Your browser downloads the result automatically. Nothing was ever sent to a server.
🔗 How Merge Works
1
Add Your PDFs
Click Add PDF Files… and select two or more PDFs. You can add files in multiple batches — each batch appends to the list.
2
Drag to Reorder
Grab the ☰ handle on any file and drag it up or down to set the final page order before merging.
3
Merge & Download
Click Merge PDFs. Pages from every file are copied in order into a single new PDF and downloaded as merged.pdf. Text layers and links are fully preserved.
✂️ How Split Works
1
Choose a PDF
Click Choose PDF… and select the file you want to split. The total page count is used to validate your ranges.
2
Choose Split Mode
Select Page ranges to extract specific groups (e.g. 1-3, 5, 7-9), or Every page separately to get one file per page.
3
Split & Download
Click Split PDF. Each range downloads as a separate PDF named after the source file and page numbers. Text layers are preserved.
🖼 How Image → PDF Works
1
Add Your Images
Click Add Images… and select JPEG, PNG, or WebP files. You can add images in multiple batches.
2
Set the Page Order
Drag the ☰ handle to reorder images before building. Each image will become one page in the final PDF.
3
Build & Download
Click Build PDF. Each image is embedded at its original pixel dimensions. The result downloads as images.pdf.
📷 How PDF → Image Works
1
Choose a PDF
Click Choose PDF… and select the file whose pages you want to export as images.
2
Set Format & Scale
Choose JPEG (smaller, adjustable quality) or PNG (lossless). Set the scale — 2× gives clean 144dpi output from a standard PDF.
3
Export & Download
Click Export Images. Single-page PDFs download as one image file. Multi-page PDFs are automatically bundled into a .zip archive.
🔒 Why Choose Client-Side PDF Tools?
🕵️ Total Privacy
Your files never leave your computer. Most online PDF tools upload your documents to remote servers — potentially storing them for days. With CrunchyPDF, there's nothing to intercept, breach, or subpoena.
⚡ Instant Speed
No upload time. No queue. No server-side processing delays. Every tool starts the moment you click and is only limited by your device's CPU — not a remote server's load.
🌐 Works Offline
Once the page is loaded, all five tools work without an internet connection. Perfect for airplanes, remote locations, or corporate environments with restricted outbound access.
📂 No File Size Caps
Server-based tools typically cap uploads at 10–50MB to control bandwidth costs. CrunchyPDF has no such restriction — your memory and browser are the only limits.
💸 Always Free
No subscriptions, no premium tiers, no "you've used your 2 free conversions today." All five tools are permanently, unconditionally free for personal use.
🔓 Open Tech Stack
Built on open-source libraries: PDF.js, PDFKit, pdf-lib, JSZip, and standard browser APIs. No proprietary black boxes. Fully transparent processing.
💡 Tips for Best Results
🗜
Compress — start at quality 0.5. This reduces most PDFs by 40–70% with minimal visible quality loss. Scan-heavy documents may need 0.6–0.7 to stay legible. Note: text becomes image after compression — searchable text is not preserved.
🗜
Compress — batch multiple files. Select multiple PDFs at once (hold Ctrl or Cmd). They process sequentially, each downloading with a quality suffix in the filename. Keep your tab active during processing.
🔗
Merge — order matters. Drag files into your desired order before clicking Merge. Unlike Compress, Merge uses pdf-lib to copy pages losslessly — text layers, hyperlinks, and form fields are preserved in the output.
✂️
Split — use commas to extract non-contiguous pages. The format 1-3, 5, 8-10 creates three separate output files. "Every page separately" is useful for archiving or reordering individual pages before merging.
🖼
Image → PDF — WebP and BMP are supported. These formats are automatically converted to JPEG internally before embedding. For best quality on transparent PNGs, the transparency is filled with white.
📷
PDF → Image — use 2× scale for sharp results. 1× can look pixelated on screen; 2× gives 144dpi which is sharp for most uses. Use PNG for diagrams and text-heavy pages; JPEG for photos and presentations.
🗂️ Common Use Cases
📧 Email Attachments
Many email providers cap attachments at 10–25MB. Compress a large report before sending so it fits without cloud sharing.
🏛️ Online Forms & Portals
Government portals and HR systems often reject uploads over 5MB. Compress your scanned documents to meet size requirements without re-scanning.
📑 Combine Reports
Merge monthly reports, invoices, or chapters into one PDF for filing or sharing. Drag to set the exact order — no quality loss, text layers intact.
📄 Extract Key Pages
Split a 200-page contract to send only the pages relevant to your client. Type a range like 12-15 and download just those pages in seconds.
📸 Scans & Photos → PDF
Have a stack of scanned JPEGs or phone photos? Use Image → PDF to bundle them into one shareable document — great for receipts, passports, or portfolios.
🖼️ PDF Slides → Images
Need a presentation slide as a PNG for a website or social post? Use PDF → Image to export any page at high resolution — no Acrobat required.
🔐 Sensitive Documents
Medical records, legal contracts, tax returns — these should never leave your device. Every CrunchyPDF tool is purpose-built for sensitive files you'd never upload to a third-party server.
☁️ Cloud Storage Savings
Compress your PDF archive before uploading to Google Drive or Dropbox. 50 scanned invoices can shrink from 500MB to under 100MB — freeing up valuable storage quota.
⚠ Features of server-based tools vary. Always review the privacy policy of any tool before uploading sensitive documents.
❓ Frequently Asked Questions
Results vary widely. Text-heavy PDFs at quality 0.5 typically shrink 50–80%. Image-heavy PDFs at 0.7 may shrink 20–50%. PDFs already highly compressed may shrink less. Experiment with different quality levels to find your sweet spot.
Yes — the Compress tool uses lossy JPEG compression, so some visual quality is traded for smaller file size. Every page is converted to an image, so selectable text, hyperlinks, and form fields will not be in the output. The Merge and Split tools use pdf-lib and copy pages losslessly — text and links are fully preserved.
Yes, completely. All five tools run 100% client-side using browser JavaScript. You can verify this yourself using your browser's Network tab in DevTools (F12 → Network → run any tool): you will see zero outgoing requests carrying your file data. Processing happens in your own browser memory using your own CPU.
The slider controls JPEG encoding quality passed to the browser's Canvas API. 1.0 = maximum quality (least compression, largest file). 0.1 = minimum quality (most compression, visible artifacts). Default 0.5 is a balanced middle ground. This slider only applies to the Compress tool — Merge and Split are lossless.
Yes — in the Compress tab, hold Ctrl or Cmd while selecting files to pick multiple PDFs. Each file is processed and downloaded individually with the quality suffix in the filename (e.g. document_min_0.5.pdf). Processing is sequential.
Compress renders every page to an HTML canvas using PDF.js and encodes it as JPEG — a CPU-intensive process running on your device. A 100-page high-res PDF can take 30–90 seconds. Merge and Split are much faster since they copy pages without re-rendering.
Type page numbers and ranges separated by commas: for example 1-3, 5, 7-9 produces three output files — pages 1 to 3, page 5 alone, and pages 7 to 9. Each group downloads as a separate PDF. Choose "Every page separately" to get one file per page.
JPEG, PNG, WebP, GIF, and BMP are accepted. PNG files are embedded as-is. WebP and BMP files are automatically converted to JPEG internally via canvas before embedding. For best results use JPEG or PNG source files.
2× is recommended for most uses — it renders at 144dpi which looks sharp on screen and in documents. Use 3× for printing or detail work. 1× (72dpi) can look soft on modern displays. Single pages download as a single image file; multiple pages are bundled into a ZIP automatically.
Yes — all tools work in modern mobile browsers (Chrome, Safari, Firefox on Android/iOS). Large PDFs may be slow on lower-powered devices, and some browsers impose memory limits on very large files. For best mobile results keep PDFs under 30MB.
No. All tools require unencrypted PDFs. Remove password protection first using your PDF reader's export or print-to-PDF feature, then use CrunchyPDF.
CrunchyPDF is a privacy-first, fully client-side PDF toolkit that works 100% in your browser
No files are ever uploaded to any server. All processing — including PDF parsing, page rendering, image compression, and final repackaging — happens locally on your device using JavaScript.
We are strongly committed to user privacy. Because everything runs in your own browser, your files remain completely
under your control at all times. We do not receive, store, or have any access to the PDFs you process. We do not keep
track of any files, their content, or any compression activity. There are no accounts, no registrations, no cloud storage,
and no tracking of any kind.
This local, client-side approach ensures maximum privacy and security. You can compress your PDFs confidently, knowing
that your documents never leave your computer. Simply close the tab at any time to immediately stop all processing.
By using CrunchyPDF, you accept full responsibility for the files you process and for the resulting output. You represent and warrant that you have all necessary rights and legal permissions to modify and compress the PDFs you submit. Do not use this tool for any unlawful, infringing, or unauthorized files. Use of this service is subject to our
Terms of Service.
Please read before continuing
Why CrunchyPDF Stands Out for Private PDF Compression
CrunchyPDF is a fully client-side PDF compressor that runs 100% in your browser.
No files are uploaded, no data is stored on any server, and your documents never leave your device.
This privacy-first approach gives you fast, secure compression with complete control.
Other Popular PDF Compression Tools
Here are some well-known alternatives if you're exploring server-based options.
Note that most of these tools process and store your files on their servers — always check their privacy policies before uploading sensitive documents.
