将任何 JPG、PNG 或 WEBP 照片减小到正好 200KB — 或您选择的任何目标大小。无需上传到服务器，无需注册，100% 私密。
支持 JPG、PNG、WEBP · 一次最多 20 张图像
The 200 KB preset is selected by default. You can also choose 50 KB, 100 KB, 500 KB, 1 MB, or enter any custom size in the KB field.
Click Select Images or drag and drop up to 20 JPG, PNG or WEBP files onto the tool. Compression starts automatically — no waiting, no server upload.
Each compressed image appears instantly with a before/after size comparison. Click Download for individual files or Download All for a batch.
所有压缩均使用 Canvas API 在浏览器内进行。您的图像永远不会离开您的设备，也永远不会发送到任何服务器。
与按固定百分比降低质量的工具不同，我们的压缩器每次都使用二分搜索算法来准确达到您的 200KB 目标。
压缩完全在浏览器中完成，无需服务器往返。即使是 20 张图像的大批量处理也能在几秒钟内完成。
一次最多上传 20 张图像，并同时将它们全部压缩至 200KB。单独下载或一次性全部下载。
无需订阅，无水印，无隐藏限制。根据需要压缩任意数量的图像。
完全响应式，适用于台式机、平板电脑和移动设备。无需安装应用程序 - 只需打开页面并开始压缩。
许多在线平台、政府门户网站和应用系统对上传的照片有严格的文件大小限制。以下是需要将图像减小到 200KB 或更小的最常见情况：
| Use Case | Typical Size Limit | Recommended Target |
|---|---|---|
| University / college admission form | 100–200 KB | 200 KB |
| Bank account opening form | 100–200 KB | 200 KB |
| Job application portal upload | 200–500 KB | 200 KB |
| Blog post / website thumbnail | No strict limit | 200 KB |
| WhatsApp / Telegram image share | No strict limit | 200 KB |
| Email attachment (inline image) | No strict limit | 200 KB |
| Government ID / document scan | 100–500 KB | 200 KB |
| Online exam registration photo | 50–200 KB | 200 KB |
200KB 已成为在线表单上传的广泛使用的限制，因为它可以平衡良好的图像质量和快速的上传速度，即使在较慢的移动连接上也是如此。典型尺寸（600×600 像素）的 200KB JPEG 为身份验证、个人资料图片和文档扫描保留了出色的视觉质量。
If your form requires a smaller size, use the 100 KB or 50 KB preset. For higher-quality images where the form allows up to 500 KB, use the 500 KB preset instead.
India has some of the strictest photo size requirements for online government portals. Most Indian government exam and application portals require photos between 10KB and 200KB, with many specifying exactly 50KB or 100KB. Here's a complete reference for the most common Indian government forms:
| Exam / Portal | Photo Size Limit | Signature Size Limit | Recommended Tool |
|---|---|---|---|
| UPSC Civil Services | 40KB – 300KB | 20KB – 300KB | 100KB tool |
| SSC (CGL, CHSL, MTS) | 20KB – 50KB | 10KB – 20KB | 50KB tool |
| IBPS / SBI Bank PO & Clerk | 20KB – 50KB | 10KB – 20KB | 50KB tool |
| NEET (Medical Entrance) | 10KB – 200KB | 4KB – 30KB | 200KB tool |
| JEE Main / Advanced | 10KB – 200KB | 4KB – 30KB | 200KB tool |
| RRB (Railway Recruitment) | 20KB – 50KB | 10KB – 40KB | 50KB tool |
| GATE | 5KB – 200KB | 5KB – 200KB | 200KB tool |
| CAT (MBA Entrance) | 10KB – 80KB | 10KB – 80KB | 50KB tool |
| Passport Application (India) | Up to 500KB | — | 500KB tool |
| Aadhaar / PAN Card Update | Up to 200KB | — | 200KB tool |
| Voter ID / EPIC | Up to 200KB | — | 200KB tool |
| State PSC Exams | 20KB – 100KB | 10KB – 50KB | 100KB tool |
Before compressing, note the minimum and maximum KB allowed. For example, SSC requires 20–50KB for photos. Select the matching preset on this tool (e.g., click 50 KB).
Use a clear, recent photo with white background. JPG format is accepted by all Indian government portals. Drag and drop or click Select Images.
压缩后，该工具会显示准确的输出大小。上传到政府门户网站之前，请确认其在允许的范围内。右键单击下载的文件→属性进行仔细检查。
不同的国家对在线表格照片上传有不同的要求。这是一个快速参考：
| Country / Region | Common Use Case | Typical Photo Size Limit |
|---|---|---|
| 🇮🇳 India | Government exams, bank forms | 20KB – 200KB |
| 🇺🇸 United States | US Visa DS-160, ESTA | Up to 240KB (JPEG) |
| 🇬🇧 United Kingdom | UK Visa, BRP application | Up to 6MB (but 200KB recommended) |
| 🇨🇦 Canada | eTA, PR application | Up to 4MB (but 200KB recommended) |
| 🇦🇺 Australia | ImmiAccount visa upload | Up to 5MB (but 200KB recommended) |
| 🇩🇪 Germany / EU Schengen | Visa application | Up to 6MB (but 200KB recommended) |
| 🇸🇦 Saudi Arabia | Iqama, Hajj/Umrah visa | Up to 200KB |
| 🇦🇪 UAE | Residence visa, Emirates ID | Up to 200KB |
| 🌏 Most Asian countries | University admission, job portals | 100KB – 200KB |
For detailed passport photo requirements by country, see our dedicated Compress Image for Passport guide.
Our tool uses the browser's built-in Canvas API to re-encode your image at progressively adjusted JPEG quality levels until the file size reaches exactly 200KB or below. Here's the process:
Instead of blindly reducing quality step by step (which is slow and imprecise), we use a binary search approach. We start at quality 0.5, check the resulting file size, then move the quality up or down by half the remaining range. This converges on the optimal quality in just 10–15 iterations — giving you the highest possible quality that still meets your 200KB target.
This technique is based on the standard binary search algorithm described in MDN's HTMLCanvasElement.toBlob() documentation, which is the browser API we use to encode images at a specific quality level.
JPG / JPEG: Best for photographs. The Canvas API encodes output as JPEG, which gives the best compression ratio for photos. Original JPEG files are re-encoded at the optimal quality level.
PNG: PNG files are converted to JPEG for compression. If you need to keep transparency, note that transparent areas will be filled with white. For logos and icons with transparency, consider keeping the original PNG.
WEBP: WebP images are decoded and re-encoded as JPEG. The output will be a .jpg file. According to Google's WebP documentation, WebP typically achieves 25–34% smaller file sizes than JPEG at equivalent quality — so your WebP originals may already be quite compact.
如果您的原始图像已经小于 200KB，该工具将原样返回。对已经满足要求的图像进行重新编码是没有意义的——这样做只会降低质量，而没有任何好处。
Because all processing happens in your browser via the HTML5 Canvas API, your images are never transmitted over the network. This is especially important for sensitive documents like passport photos, ID scans, and bank documents — the kind of files most commonly subject to 200KB upload limits.
该工具完全在您的移动浏览器中运行 - 无需下载应用程序。以下是在手机上使用它的方法：
Go to compressto200kb.com in your iPhone browser. The tool is fully responsive and works on all iPhone models running iOS 14 or later.
Tap the blue Select Images button. Your iPhone will show the photo picker — choose from your Camera Roll, Files app, or take a new photo directly. You can select multiple photos at once.
Tap ⬇ Download on the result. Safari will save the file to your Downloads folder (Files app → On My iPhone → Downloads). In Chrome, the file saves automatically to your Downloads.
适用于所有运行 Chrome 80+ 的 Android 手机。无需安装应用程序。
点击按钮并从图库或文件应用程序中选择您的照片。您可以通过长按文件选择器一次选择多个图像。
Tap ⬇ Download. The compressed JPEG saves to your phone's Downloads folder. Open your Files or My Files app to find it, then upload directly to any government portal or form.
Add to Home Screen: In Safari, tap the Share button → "Add to Home Screen" to create a shortcut. In Chrome, tap the three-dot menu → "Add to Home Screen". This gives you one-tap access without opening the browser each time.
Compress directly before uploading: On Android, after downloading the compressed file, you can share it directly to WhatsApp, Gmail, or any app using the Android share sheet — no need to navigate to the Downloads folder.
HEIC photos on iPhone: If your iPhone saves photos in HEIC format, Safari automatically converts them to JPEG when you select them in the file picker. The tool will receive a JPEG and compress it normally.
需要不同的文件大小？从我们针对最受欢迎目标的专用工具中进行选择：