Smart PDF Optimizer - Batch Compressor

Efficient compression algorithm while keeping text sharp. Fully offline local processing, files never leave your device.

🔥 A truly local PDF compression tool — your files never leave your device. Zero privacy risk. Drag and drop, batch process, and generate multiple output types in a single pass. Smart compression only re-encodes embedded images, so text and vector graphics stay sharp, selectable, and searchable. 【FEATURES】 ✦ Local & Offline All compression runs right in your browser. No files are uploaded to any server. Works entirely offline. Your documents stay private. ✦ Smart Compression, Crisp Text Parses the original PDF structure, preserves text and vector graphics, and re-encodes only the embedded images. The result is still a real PDF you can select, search, and copy from — ideal for contracts, reports, resumes, and e-books. ✦ Three Outputs, Multi-Select • Smart Compress PDF: keeps text & vectors, compresses images only — best balance of size and readability • Image-only PDF: each page rendered to a bitmap and reassembled into a PDF — smaller size, great for scans • Images (JPG): each page exported as JPG, multi-page files auto-zipped Pick several at once and compare the results before choosing. ✦ Batch Compression Drag & drop or click to import multiple PDFs, processed in parallel with real-time per-page progress. Download everything as a ZIP, or save each result individually. ✦ Adjustable Quality + Auto Resolution Tiers A continuous 20–95 quality slider, with render resolution automatically matched to the quality range (96 / 150 / 200 DPI). Resolution-first tuning keeps pages sharper at the same file size. Changed a setting? Recompress everything with one click. ✦ Built for Big Files Page-by-page streaming render via pdf.js plus efficient mozjpeg encoding handles long, multi-page documents reliably — with zero server bandwidth. ✦ Dark Mode & Bilingual UI Switch between light and dark themes. The interface follows your browser language (English / 简体中文). Easy on the eyes during long sessions. 【USE CASES】 • Work & applications: shrink contracts, reports, and resumes to meet email attachment and upload limits • Students & teachers: batch-slim papers, handouts, and exams for easy sharing and archiving • Scanned documents: bring oversized scans down to a shareable size • E-books & document libraries: save space on your disk and cloud storage • Need images instead: export every PDF page as a JPG in one click --- Questions or feedback? Reach us via the email button on the extension page.