缩小PDF体积同时保持清晰度。可选三档压缩质量，或直接指定目标大小（100KB～20MB）——输出保证不超过你的限制，专为有大小上限的上传表单设计。
Reduce PDF file size
Free outputs include a small "Processed by Konomic" footer. Upgrade to remove →
Drag & drop files here, or click to browse
PDF · up to 50 MB (free)
Upload your PDF
Select compression level: Maximum, Recommended, or Minimum
Click 'Compress PDF'
Download the smaller file
Reduce your PDF file size without losing quality. Choose from three compression levels to balance size and quality.
Typical compression reduces file size by 40-80% depending on content. Image-heavy PDFs compress more.
Maximum compression may slightly reduce image quality. 'Recommended' provides the best balance.
See how Konomic compares to popular compress pdf tools:
Compress your PDF to a target size with a single click.
Typical reduction is 40-80% depending on the PDF type. Image-heavy PDFs compress most (up to 80%); text-only PDFs compress less (20-40%).
Yes. Use the size selector or visit dedicated pages like konomic.io/compress-pdf-to/1mb or konomic.io/compress-pdf-to/100kb. Konomic runs a binary search over DPI and quality presets to hit your target.
Low and medium compression are visually lossless for most use cases. High compression re-encodes images at lower DPI and may show artifacts in photos; text remains sharp.
Free tier: 50 MB input. Pro: 100 MB. Business: 500 MB. Output size depends on compression level chosen.
Yes. Scanned PDFs (image-based) compress exceptionally well — often 70-90% reduction. For best results, also consider running OCR first (konomic.io/ocr) to convert scans to searchable text with even smaller file sizes.
See how Konomic compares to popular compress pdf tools:
上传PDF文件
选择压缩档位，或切换到「精确大小」模式
点击「压缩」
下载压缩后的PDF
无隐藏费用，无需信用卡。基础工具永久免费。
TLS加密传输，欧盟服务器处理，文件一小时内自动删除。
大多数操作几秒内完成，无需排队。
直接在浏览器中使用，不占用设备空间。
电脑、手机、平板均可流畅使用。
文件绝不用于AI训练，绝不与第三方共享。
能。「精确大小」模式下输入目标（如500KB），算法自动寻找符合限制的最高质量，输出保证≤目标。
压缩主要通过降低图片分辨率实现。文字始终保持清晰可选中。
免费：每天3次（注册后20次），单文件50 MB，无水印选项。
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