Compress PDF Online
Real client-side PDF compression. Reduce document file size while preserving crisp selectable text, fonts, and vector graphics.
Drag & Drop a PDF file to compress
or Browse Files
Max 50 MB
100% Client-Side Privacy
Your documents are never uploaded to any remote server or cloud bucket. All compression algorithms run locally in your web browser.
Text & Vectors Preserved
Unlike crude screenshot compressors, ToolBro preserves font subsets, selectable text, hyperlinks, and vector artwork intact.
Smart Adaptive Optimization
Embedded raster assets are selectively downscaled and recompressed with object stream packing to minimize output size.
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Frequently Asked Questions
ToolBro parses the internal PDF object tree directly inside your browser using WebAssembly and JavaScript. It strips unneeded metadata, recompresses embedded images using modern codecs, and deflates object streams locally in your device's memory.
PDFs generated directly from word processors (such as Word or Google Docs) with only text and no embedded images are already compact. In those cases, the compressor strips metadata and packs streams, but reduction is naturally modest (5–15%). For image-heavy or scanned PDFs, reductions often reach 50–80%.
Yes! In Low, Medium, and High compression levels, all vector glyphs, fonts, and text encoding layers remain 100% intact. Only embedded photographic image streams are optimized.
Never. The PDF optimization algorithms execute 100% inside your browser's local memory. No files or document contents ever leave your device.