Compress JPG to 100KB
Compress files to 100KB directly in your browser with no upload required.
Select JPG/JPEG 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.
Compress, convert & crop images offline on iPhone - privacy-first, batch up to 200
Related Tools
Compressing JPG to Under 100 KB
Why JPG is the format of choice for photographs
JPG (JPEG) uses lossy compression built on the discrete cosine transform, which discards the visual data the human eye is least likely to notice — subtle color gradients and high-frequency detail. That makes it uniquely efficient for photographs and complex, full-color images, where it routinely reaches files 50–80% smaller than PNG at near-identical appearance. The trade-off is permanent: each re-save at a low quality level compounds artifacts, so JPG is best treated as a final-delivery format rather than an editing master.
The quality slider: finding your sweet spot
JPG compression is governed by a single quality value. Settings between 70 and 85 typically deliver the best balance for the web — file sizes drop sharply while artifacts stay below the threshold of visibility. Below 70, blocking and banding become apparent; above 90, file size balloons with almost no perceptible gain. For thumbnails and previews you can push lower; for portfolio prints, stay high. A live preview lets you compare quality levels side by side before committing.
Private, instant, and unlimited — entirely in your browser
Every image is decoded and re-encoded locally with the browser's native Canvas and WebAssembly pipeline, so nothing is uploaded to a server. There is no per-file fee, no queue, and no cap on how many photos you can process. That makes batch-optimizing a photo library or a product catalog practical on your own machine, with the speed of your CPU and the privacy of local processing.
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
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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.
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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.
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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
Why do my JPEGs get worse each time I re-save?
JPEG is generational-lossy: each re-save discards more data. Always compress from the original source file, not from an already-compressed JPEG.
What is chroma subsampling and does it hurt quality?
It reduces color detail more than brightness, exploiting how human vision works. At Q80 it is virtually invisible in photos but can soften small red text.
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
Learn More About Image Compression
Explore these authoritative resources to deepen your understanding of image compression and optimization.
MDN Web Docs: Image Optimization
Comprehensive guide on image optimization for web performance by Mozilla.
Google Web Fundamentals: Image Optimization
Best practices for image optimization from Google's web performance team.
W3C WebP Specification
Official W3C specification for the WebP image format.