Compress BMP to 20KB

Compress files to 20KB directly in your browser with no upload required.

Select BMP files

or drop files here

Maximum file size: 50MB per file

100% Secure

All processing happens in your browser. Your files never leave your device.

Super Fast

Process multiple files in seconds with our optimized browser-based tools.

High Quality

Keep your files clear and usable while reducing size or converting formats.

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ImageTiny

Compress, convert & crop images offline on iPhone - privacy-first, batch up to 200

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Compressing BMP to Under 20 KB

The 20 KB target converts the BMP to WebP at aggressive quality with dimensions near 800 px. Given how large raw BMPs are, hitting 20 KB means accepting visible softening, suitable only for tiny thumbnails, placeholders, and low-bandwidth previews. The tool defaults to WebP because it extracts the most quality from such a small budget. Reserve this target for genuinely small display contexts. Whether you are optimizing assets for a US-hosted site on AWS, Cloudflare, or Vercel, trimming email attachments for Gmail and Outlook, or submitting documents to federal portals, this tool keeps your files lean and your workflow fast — all without uploading anything to a server.

Optimized for Users in the United States

If you are working in the United States, file size matters for email providers like Gmail (25 MB attachment cap), Outlook, and popular US hosting platforms. Compressing images and documents before uploading to Amazon S3, Cloudflare, or Netlify keeps your bandwidth costs down and improves Core Web Vitals for American visitors on both fiber and mobile networks.

  • Most US email services reject attachments above 25 MB — compress to stay under that limit without switching to Google Drive or Dropbox.
  • For US-based e-commerce on Shopify, aim for product images under 200 KB to keep your Google PageSpeed score competitive.
  • Social platforms popular in the US — Instagram, Facebook, X (Twitter), and LinkedIn — each re-encode uploads, so feed them the smallest high-quality source file you can.
  • Many US government and healthcare portals restrict document uploads to 5–10 MB; pre-compressing PDFs avoids upload failures.
How to Use This Tool
  1. 1
    Select Your Files

    Click the upload button or drag and drop your files into the area. You can queue multiple files at once for batch processing.

  2. 2
    Start Processing

    Pick the settings you need and start the tool. Everything runs locally in your browser — no upload, no waiting on a remote server.

  3. 3
    Download the Results

    Save your processed files one by one or all at once. Your originals are never modified, so you can always start over.

Frequently Asked Questions

Is 20 KB realistic for a BMP photo?

Only as a tiny preview. BMP photos are multi-megabyte; reaching 20 KB requires heavy lossy compression and small dimensions.

Why WebP rather than JPEG from a BMP?

WebP delivers better quality at 20 KB than JPEG. Since BMP has no compression of its own, the choice of output format determines the final quality.

Will this work with my Gmail or Outlook attachments?

Yes. Gmail and Outlook both cap attachments near 25 MB. Our tools can shrink most files well under that limit so you can attach them directly instead of linking to Google Drive or OneDrive.

Can I use this for sensitive business or healthcare documents?

Since all processing happens locally in your browser and nothing is uploaded, your files never touch our servers. This client-side approach supports privacy-conscious US workflows — still follow your own organization's data policies.

Does it work on Mac, Windows, and mobile?

Yes. Our tools run in any modern browser on macOS, Windows, ChromeOS, Linux, iOS, and Android. No downloads or installations required.

Is there a file size limit?

Most tools handle files up to 50 MB each. For larger files, process them in smaller batches for the smoothest experience.

Why Choose Let Compress?
  • No upload required — your files stay on your device, aligning with US privacy expectations
  • Free forever, no sign-up or credit card — we never sell your data
  • Batch process dozens of files at once — built for fast US broadband and 5G workflows
  • Tuned for US-hosted sites on AWS, Cloudflare, Vercel, and Netlify
  • Runs in any modern browser — Chrome, Safari, Firefox, Edge on Mac, Windows, and mobile
  • No file quotas or daily limits — compress as much as your project needs