File Compression Guides
Practical, vendor-neutral guides to compressing images, PDFs and documents. Every technique here runs entirely in your browser — no uploads, no accounts.
How to Compress Images
Beginner · 5 min
Reduce JPEG, PNG and WebP files by 60–90% in the browser, with quality settings explained.
ReadHow to Compress PDF Files
Beginner · 6 min
Shrink PDFs while keeping text sharp, and pick the right mode for scans versus text documents.
ReadCompress Images for Email
Beginner · 4 min
Get attachments under Gmail and Outlook limits without visibly degrading photos.
ReadCompress Images for Social Media
Beginner · 4 min
Target Instagram, X and LinkedIn dimensions and file sizes before uploading.
ReadBatch Compress Multiple Images
Intermediate · 5 min
Process 100+ files at once with a worker pool, then download everything as a ZIP.
ReadCompress Without Quality Loss
Intermediate · 7 min
What lossless really means, when it is achievable, and how to measure quality with SSIM.
ReadImage Compression for Web Performance
Advanced · 8 min
Use compression, formats and sizing to improve LCP and Core Web Vitals.
ReadJPEG XL Compression Guide
Advanced · 9 min
How JXL compares to JPEG, WebP and AVIF, including lossless JPEG recompression.
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