Comprimir PDF
Reduce the file size of your PDF while maintaining optimal visual quality for uploads and email attachments.
Selecionar arquivo PDF
or drag and drop PDF here
Guia de Otimização: A Mecânica da Compressão de PDF
PDF files can become bulky when they contain high-resolution images, embedded fonts, and complex vectors. Compressing a PDF involves optimizing these assets to reduce file size without compromising readability.
Lossless vs. Lossy PDF Optimization
PDF compression uses two main methods: lossless and lossy. Lossless compression shrinks text streams using algorithms like FlateDecode (Deflate). Lossy compression targets raster images embedded in the document, compressing JPEG data or downsampling images (e.g. from 300 DPI to 150 DPI) to dramatically reduce file sizes.
The Security Advantage of Local Compression
Because PDFs often contain financial statements or confidential records, uploading them to public cloud servers for compression poses privacy risks. DocumentAlter compresses PDFs directly in your browser, keeping your sensitive documents secure.
Como Comprimir um PDF (Guia Passo a Passo)
Import Target PDF File
Select or drag the PDF document you want to optimize into the compression area.
Configure Optimization Strength
Choose your compression level: Recommended (best quality/size ratio), Extreme (maximum size reduction), or Low.
Optimize and Download
Run the local optimization script to re-compress the document and download the smaller file.
Perguntas Frequentes
Para reduzir o tamanho do PDF, arraste o arquivo para "Comprimir PDF", escolha o nível desejado e faça o download do arquivo leve.
O DocumentAlter aplica otimização inteligente, mantendo textos e imagens nítidos enquanto remove dados redundantes do arquivo.
Sim. Os algoritmos funcionam totalmente na memória do navegador. Seus documentos privados nunca são enviados pela internet.