Compress Image to 100 KB Online
Reduce any photo or image to exactly 100 KB (or any custom target) in your browser. No upload, no guesswork.
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图片压缩
压缩图片到目标大小
上传图片并设置所需的最大文件大小。免费、安全，在浏览器中运行。
拖放图片到此处
或点击浏览（PNG、JPG、WebP — 最大50MB）
关于图片压缩
我们的高级图片压缩工具使用多轮自适应压缩实现最佳文件大小缩减。设置精确的目标大小，引擎会自动找到质量和大小的最佳平衡。
功能：
- 设置精确的最大文件大小目标（MB或KB）
- 智能质量搜索的多轮自适应压缩
- 支持PNG、JPG和WebP格式
- 最大50MB输入文件大小限制
- 完全在浏览器中运行 — 文件永远不会离开您的设备
- 完全免费，无需注册
Why this matters
Many forms, job portals, and government websites impose strict upload limits — 100 KB is a common threshold for profile photos and document attachments. Manually trial-and-erroring quality settings wastes time. A target-size compressor does the math for you, automatically adjusting quality until the file lands under your limit.
Step by step
- 1Open the Image CompressorDrop in your JPG, PNG, or WebP image.
- 2Set the target to 100 KBType "100" and choose "KB" as the unit.
- 3CompressThe compressor iterates quality settings in your browser until the output is at or below 100 KB.
- 4PreviewCompare the before and after. At 100 KB most photos still look sharp.
- 5DownloadSave the compressed image. The file size is guaranteed under 100 KB.
Frequently asked questions
Can I compress a photo to exactly 100 KB?
The tool targets at or below 100 KB. It may land at 95–100 KB depending on image content — it won't exceed your target.
Will a 100 KB photo still look good?
For typical face photos or simple scenes, yes. A 6 MP photo compressed to 100 KB at 60–70% quality is still clear and sharp enough for web forms and profiles.
Which format compresses best to 100 KB?
JPG is the most efficient for photos at small sizes. WebP is similarly small and slightly better in quality. PNG should only be used if transparency is needed.
Does compressing to a target size upload my image?
No. All compression runs in your browser using JavaScript. Your images never leave your device.
What if the image is already under 100 KB?
The compressor will leave it unchanged — or apply minimal compression. You'll see the original file size in the preview.
I need to compress to 200 KB, 500 KB, or 1 MB — can I?
Yes. The target size field is fully customizable. Enter any value in KB or MB.
Further reading
- JPG vs PNG: Which Image Format Should You Use?JPG and PNG are the two most common image formats on the web, but they serve very different purposes. Learn which one to use for photos, logos, screenshots, and more.
- What Is WebP and Should You Use It?WebP is a modern image format from Google that delivers smaller files than JPG or PNG with comparable quality. Here is everything you need to know before switching.
- How to Compress Images Without Losing QualityLarge image files slow down websites and fill up storage. This guide explains the practical techniques for making images smaller while keeping them looking sharp.
You might also need
- Compress Image to 20 KB — Passport & Visa PhotosReduce a photo to under 20 KB for online passport, visa, and government applications — without uploading sensitive identity photos to any server.
- Compress JPG Images Online — Free & PrivateReduce the file size of JPG and JPEG photos right in your browser. Drop in any JPEG, pick your target size, and download the compressed image. Nothing is uploaded to a server.
- Compress PNG Online — Lossless & LossyShrink PNG files in your browser without losing transparency or quality. Perfect for screenshots, app icons, and graphics destined for the web.