Compress PDF — Reduce PDF File Size Online Free
Compress images and convert to PDF. Adjust quality, resize, and download — 100% free, no server upload.
Drop images here or click to browse
Supports JPG, PNG, WebP
Your files are processed entirely in your browser. Nothing is uploaded to our servers.
How to Compress Images & Convert to PDF
- Upload your images — Click the upload area or drag and drop JPG, PNG, or WebP files.
- Adjust compression — Use the quality slider (10%-100%) and set max dimensions to control file size.
- Download — Download compressed images individually or convert all to a single PDF.
Why Use This Image Compressor?
- 100% Free — No hidden costs, no watermarks, no limits on file count.
- Private and Secure — All processing happens in your browser. Your files never leave your device.
- Adjustable Quality — Fine-tune the compression level from 10% to 100% to balance size and quality.
- Batch Support — Compress multiple files at once and see individual before/after sizes.
- PDF Export — Convert your compressed images into a single PDF document with one click.
- Resize Options — Optionally reduce image dimensions to 1920px, 1280px, or 800px for further savings.
Supported Image Formats
This tool supports the most common image formats:
- JPG / JPEG — The most widely used image format, ideal for photographs and web images.
- PNG — Supports transparency, great for graphics, screenshots, and logos.
- WebP — Modern format with excellent compression, widely supported in modern browsers.
Why Compress PDF Files?
Large PDF files can be a significant obstacle in daily digital workflows. Most email services limit attachment sizes to 25MB, and many government portals in Nepal — including the Lok Sewa Aayog application portal, Nepal Telecom's online services, and various ministry websites — impose even stricter upload limits of 2-5MB. Compressing your images before converting to PDF ensures your documents stay within these size limits.
Faster upload and download speeds are another key benefit. In Nepal, where internet speeds can vary significantly across regions, smaller file sizes mean less waiting time when sharing documents. Compressed PDFs also use less storage space on your device and in cloud storage services like Google Drive or Dropbox, helping you manage your digital documents more efficiently.
How PDF Compression Works
Image compression reduces file size by applying mathematical algorithms that remove redundant or less perceptible visual data. At higher quality settings (80-100%), the compression is nearly lossless — the human eye can barely detect any difference from the original. At lower quality settings (30-60%), more aggressive compression significantly reduces file size but may introduce visible artifacts, especially in areas with fine detail or gradients.
The compression process in this tool works by re-encoding images at the selected quality level and optionally resizing them to smaller dimensions. Reducing the maximum width/height from, say, 4000px to 1920px can dramatically cut file size while still maintaining excellent quality for screen viewing and printing. The tool also strips unnecessary metadata (EXIF data such as camera settings, GPS coordinates, and timestamps) from images, which can account for a surprising amount of file size, especially in photos taken with modern smartphones.