Image Size Checker Online — Free
Last updated: May 2026 · No upload · 100% browser-based
⚡ KEY TAKEAWAYS
- Check image width, height and file size instantly — no upload needed
- Supports JPEG, PNG, WebP, GIF, AVIF formats
- All processing runs in your browser — 100% private
- Check up to 20 images at once with drag and drop
🖼️
Drop images here or click to upload
JPEG, PNG, WebP, GIF, AVIF · Up to 20 files
What Image Dimensions Should I Use?
| Use Case | Width | Max Size |
|---|---|---|
| Website hero | 1200-1920px | 200KB |
| Blog thumbnail | 800px | 100KB |
| Profile photo | 400x400px | 50KB |
| Visa/passport photo | 600x600px | 240KB |
| WhatsApp profile | 640x640px | 5MB |
| LinkedIn banner | 1584x396px | 8MB |
Frequently Asked Questions
How do I check image dimensions online?
Drop your image into the checker above. It instantly shows width, height in pixels, file size in KB, and format. No account, no upload — runs in your browser.
What is the ideal image size for a website?
Keep JPEG hero images under 200KB at 1200-1920px wide. Thumbnails: under 100KB at 400-800px. Use WebP for 25-35% better compression than JPEG.
How do I reduce image file size?
Use our free image compressor to reduce file size without losing quality. Set a target KB, and the tool compresses in your browser instantly.
E
Ethan Blake
Tax Compliance Specialist · Since 2017
Ethan Blake has helped 5,000+ freelancers and self-employed workers navigate IRS rules. He writes about image optimization for gig workers, e-commerce sellers, and visa applicants who need fast, free tools. IRS Self-Employed Tax Center ↗