将图片压缩到 400KB（JPG）
免费在线图片压缩器，精确压缩到 400KB。支持裁剪、调整大小，并安全自动删除。
What is Zero-Upload?
All processing happens in your browser. No data is sent to our servers.
将图片压缩到 400KB
- 上传图片.
- 目标大小: 400KB.
- 裁剪 / 宽度/高度 (可选).
- 压缩 → 下载压缩图片.
将图片压缩到 400KB（JPG） – 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? ›
Use the target slider for 400 KB, optionally crop and reduce dimensions. The engine iteratively tunes quality.
Will the quality suffer? ›
Most images stay visually clean; extreme downscales or ultra-low targets may soften detail slightly.
Does Zero‑Upload affect results? ›
No quality loss—only processing location changes (local vs server). Privacy is maximized in Zero‑Upload.
Which format should I choose? ›
JPG for photos, WEBP for smallest modern size, PNG for transparency-critical graphics.
400KB —— 为什么？
400KB 适用于更快上传、电子邮件附件和需要小文件大小的表单，同时保持视觉质量。
获得 400KB 且质量良好的最佳做法
Near-original clarity at ~2600–2800px; preserve textures and text readability.
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