Compress Image to 400KB (JPG/WEBP)
Free online image compressor to precisely compress images to 400KB. Supports cropping, resizing, and conversion to WEBP with secure processing and auto-delete.
What is Zero-Upload?
In Zero Upload Mode, your files are never uploaded to our servers. All compression happens locally on your device, and it even works offline—no internet connection is required. If you prefer faster performance or wider format support, you can disable it anytime.
Compress Image to 400KB
- Upload Image.
- Target Size: 400KB.
- Crop / Width/Height (Optional).
- Compress → Download Compressed Image.
Compress Image to 400KB (JPG/WEBP) – Precise & Private
Quickly compress images to exactly 400 KB (or nearby) while preserving clarity. Resize, crop, rotate and convert formats—fully in the browser with optional Zero‑Upload 100% privacy mode for sensitive content.
Adaptive Engine
Balances compression with sharpness in icons, UI elements and gradients.
Exact Targets
Hit strict limits (forms, portals, email) from 1 KB up to 2 MB.
Zero‑Upload Mode
Keep everything local—offline capable after initial load for maximum privacy.
Common Use Cases
- Job portal & application forms
- Email attachment limits
- E‑commerce product galleries
- Performance budgets (LCP-friendly)
- Blog / marketing hero images
- UI & dashboard assets
- Client previews & NDA media
- Documentation screenshots
FAQ
How do I get exactly 400 KB? ›
Will the quality suffer? ›
Does Zero‑Upload affect results? ›
Which format should I choose? ›
400KB — Why?
400KB is ideal for faster uploads, email attachments, and forms that require small file sizes, while maintaining visual quality.
Best practices to hit 400KB with good quality
Near-original clarity at ~2600–2800px; preserve textures and text readability.
Popular targets:
