Compress Image Online Free — Reduce File Size
Reduce image file size by up to 90% without visible quality loss using ShiftPx's free image compressor. Perfect for optimizing images for websites, email attachments, and social media uploads. Supports JPEG, PNG, and WebP compression with adjustable quality control. Batch compress multiple images at once. Compare original vs compressed size in real-time. No upload — everything runs privately in your browser.
Image Compressor FAQ
How much can I reduce image file size?
Typically 50-90% depending on the original format and quality setting. A 5MB JPEG can often be compressed to under 500KB at 75% quality with minimal visible difference.
What's the best quality setting for compression?
75-85% gives the best balance of small file size and visual quality. For print-quality images, use 90%+. For web thumbnails, 60-70% works great.
How to reduce image size to 100KB or 200KB?
Upload your image to ShiftPx's compressor, then adjust the quality slider downward until the output size matches your target (100KB, 200KB, etc.). The real-time size comparison shows you exactly how big the compressed file will be before you download. For very small targets, also try reducing the image dimensions using our Image Resizer first.
How to compress images for email attachments?
Most email providers limit attachments to 25MB. To compress images for email: upload your photos, set quality to 70-80%, and optionally set a max width of 1920px. This typically reduces a 10MB photo to under 1MB while keeping it sharp enough for viewing. You can batch compress multiple photos and download them as a ZIP file.
Is ShiftPx better than TinyPNG for compression?
ShiftPx offers comparable compression quality to TinyPNG with a major privacy advantage: your images never leave your device. TinyPNG uploads your images to their servers for processing. ShiftPx also supports batch compression, quality control, and multiple output formats — all free with no daily limits.
How to compress image to 50KB for government forms?
First resize your image to the required dimensions (e.g., 200×230 px for IBPS). Then upload it here and lower the quality slider until the output shows ≤50KB. Usually 40-55% quality works for photos that have already been resized to small dimensions.
Does compression reduce image quality?
Yes, but smartly. At 70-80% quality, the reduction is usually invisible to the human eye. JPEG compression removes information your eyes can't easily detect. Only at very low quality settings (below 30%) will you see noticeable artifacts like blurring or pixelation.
How to Compress Image to 100KB Online — Free
Need to compress an image to exactly 100KB, 50KB, or 200KB? Whether it's for a government form, job application, exam portal, or email attachment, ShiftPx's free image compressor lets you reduce file size with precision.
Upload your image, adjust the quality slider, and watch the real-time output size update instantly. Download only when you've hit your target size. Everything runs in your browser — your images are never uploaded to any server.
Target Size Quick Reference
Use this table to find the right settings for your target file size:
| Target Size | Resize First? | Quality Slider | Common Use |
|---|---|---|---|
| 20KB | Yes (150×200 px) | 30-40% | Tiny web thumbnails |
| 50KB | Yes (200×250 px) | 40-55% | SSC, IBPS, Railways forms |
| 100KB | Maybe (400×500 px) | 55-70% | Government forms, State PSC |
| 200KB | Usually not | 65-80% | UPSC, passport, general uploads |
| 500KB | No | 75-85% | Email attachments, web images |
| 1MB | No | 80-90% | High-quality web, presentations |
Compress Image for Government Forms & Job Applications
Indian government portals like SSC, IBPS, Railways (RRB), and State PSC have strict photo size limits — often 50KB or 100KB maximum. Here's the fastest way to meet these requirements:
- Resize first — Go to ShiftPx Image Resizer and resize to the required dimensions (e.g., 200×230 px for IBPS)
- Then compress — Upload the resized image here and lower the quality slider until you hit your target
- Verify — The output size is shown in real-time before you download
ShiftPx vs TinyPNG vs iLovePDF
| Feature | ShiftPx | TinyPNG | iLovePDF |
|---|---|---|---|
| Price | Free | Free (20/month limit) | Free (limited) |
| Privacy | 100% local | Cloud upload | Cloud upload |
| Quality control | Adjustable slider | Auto only | Low/Medium/High |
| Real-time size preview | Yes | No (after only) | No |
| Batch processing | Unlimited | 20/month free | Limited |
| Signup required | No | For API | For some features |
Supported Formats
- JPEG / JPG — Best for photos. Lossy compression gives the smallest files
- PNG — Best for screenshots, logos, and images with text. Lossless option available
- WebP — Modern format, 25-35% smaller than JPEG at same quality. Best for websites
Not sure which format to use? Try ShiftPx Format Converter to compare file sizes across formats.
