PDF Compressor vs Image Compressor
Both tools are 100% free, browser-based, and require no signup. Here is how they differ so you can pick the right one for your task.
PDF Compressor
Free PDF compressor. Reduce PDF file size by removing metadata, compressing streams, or rasterizing at lower DPI. No upload to any server — 100% browser-based. No signup.
Use PDF Compressor →Image Compressor
Compress JPG, PNG & WebP by up to 90% without visible quality loss. Files never leave your browser — no upload, no watermark, no signup.
Use Image Compressor →Feature Comparison
| Feature | PDF Compressor | Image Compressor |
|---|---|---|
| Fast mode: strip metadata and compress streams | ✓ | — |
| Standard mode: full re-save with maximum compression | ✓ | — |
| Maximum mode: rasterize pages at reduced DPI for smallest output | ✓ | — |
| Shows before/after file sizes and percentage reduction | ✓ | — |
| 100% browser-based — files never leave your device | ✓ | — |
| No signup, no watermark, no file size limit | ✓ | — |
| Compress JPG, PNG, and WebP images | — | ✓ |
| Up to 90% file size reduction | — | ✓ |
| Adjustable quality slider with live preview | — | ✓ |
| Batch compress up to 20 images at once | — | ✓ |
| Download all as ZIP | — | ✓ |
| 100% browser-based — images never uploaded | — | ✓ |
| 100% free — no signup, no watermarks | ✓ | ✓ |
| Browser-based — files never uploaded | ✓ | ✓ |
When to Use Each Tool
- →Drag and drop a PDF file onto the upload area or click to browse. The original file size is shown immediately.
- →Select Fast for quick metadata removal, Standard for full re-save compression, or Maximum for the smallest possible output (rasterizes pages to images).
- →Choose 72 DPI (smallest, web-only), 96 DPI (good balance), or 150 DPI (print-ready) for the rasterization quality.
- →Drag and drop up to 20 JPG, PNG, or WebP images onto the upload area, or click to browse your files.
- →Move the quality slider to balance file size and visual quality. A setting of 75–85% typically reduces size by 60–80% with no visible degradation.
- →Review the before/after file sizes and the compressed preview for each image.
Frequently Asked Questions
No. All compression happens inside your browser using pdf-lib and the HTML5 Canvas API. Your files never leave your device — safe for sensitive documents.
Fast mode removes metadata (author, creator, keywords) and compresses content streams using flate compression — good for PDFs with uncompressed or loosely compressed content. Standard mode performs a full re-save with all optimizations enabled. Maximum mode rasterizes each page to a JPEG image at reduced DPI — produces the smallest possible files but converts text to images.
No. All compression happens inside your browser using JavaScript. Your images never leave your device. This is the safest way to compress sensitive or private images.
JPEG/JPG, PNG, and WebP. You can drag and drop any mix of these formats and compress them all at once.
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