Compress Your Image to a Target File Size

Select your image, click the target size button (20 KB, 50 KB, 100 KB, 200 KB, 500 KB, 1 MB, or Custom), then click Compress. The tool automatically finds the best quality that fits under your chosen limit. Download the result when done.

Check your portal exact requirement before compressing — every portal specifies a different size limit. Once you know the required size, select your photo, choose that target using the presets or Custom option, and click Compress. The tool works entirely in your browser.

Yes. Compressing before sharing reduces upload time and data usage. Both WhatsApp and Instagram recompress images on their own servers, so the final quality the recipient sees is also affected by the platform. Use the Custom option to set any target size you need.

JPEG, WebP, and AVIF compression is lossy — some quality is lost. The tool shows a visual quality score after compression so you can see exactly how much quality was affected. For small targets, quality loss will be visible. For larger targets, the difference may not be noticeable — depending on the original image size and content.

Yes. You can compress up to 20 images at once. Drag and drop multiple files or select them together using your file picker. All files are compressed with the same settings. Each file gets its own Download button.

No. All processing happens in your browser. Your image never leaves your device.

First enable "Resize image if needed" in Advanced options — this allows the tool to reduce dimensions until the file fits. If the target is still not reached, increase the target size or switch to WebP or AVIF output, which typically achieve 30-50% smaller files than JPEG at the same quality.

Completely free with no monthly limits. You can compress as many images as you want. No account required. Limits: 20 files per batch, 20 MB per file, and 25 megapixels per image. The 25 megapixel limit covers all standard phone cameras — a typical phone photo is 12-16 megapixels. Professional DSLR images shot in ultra-high-resolution mode may exceed this limit.

Yes. PNG input is supported. You can output as JPEG, WebP, AVIF, or PNG. For the smallest file size, JPEG or WebP output is recommended. PNG output uses lossless optimization — file size reduces but every pixel is preserved exactly.

JPEG does not support transparency — transparent areas are filled with white. WebP, AVIF, and PNG output all preserve transparency without any fill.

JPEG, WebP, and AVIF are lossy formats. Compressing to a small target reduces quality. The smaller the target, the more quality is sacrificed.

Portals may check dimensions, format, aspect ratio, or content — not just file size. This tool only controls file size.

Yes. AI vision APIs such as GPT-4 Vision, Claude, and Gemini calculate token costs based on image dimensions and size. Larger images consume more tokens and cost more. Compressing images before sending them to an AI API can reduce token consumption significantly. Use FitPhotoKB to compress to your required size before AI processing — entirely in your browser, no uploads required.

Open FitPhotoKB, select your image, choose 200 KB as the target, and click Compress. Download the result and attach it to your AI prompt. AI vision APIs calculate token cost from image dimensions — enabling Resize image if needed gives the greatest token savings. A high-resolution photo resized and compressed to 200 KB can cost significantly fewer tokens than the original.

AVIF is a modern image format that typically achieves 20-50% smaller files than JPEG at similar visual quality, depending on image content. Use it when your portal accepts AVIF and you need the smallest possible file. Note: AVIF encoding is slower than JPEG in browsers — compression may take longer.

PNG output is lossless — every pixel is preserved exactly, transparency is kept, and file size typically reduces 10-40% via compression optimization. JPEG output is lossy — smaller files but some quality is lost and transparency is not supported. Use PNG for logos, icons, and screenshots. Use JPEG or WebP for photographs.

Re-encoding can alter or remove metadata including EXIF data. Keep your original file if metadata matters.

KB means 1,000 bytes. MB means 1,000,000 bytes. This tool uses these definitions consistently for all calculations.

Yes. Select your passport photo, choose the target size your portal requires (commonly 20 KB, 50 KB, or 100 KB), and click Compress. Check your portal requirements for both file size and minimum dimensions before uploading — most passport portals require at least 600×600 pixels. The tool shows output dimensions after compression so you can verify before downloading. Your photo is never uploaded to any server.

Select your image, then click the 100 KB preset button. Click Compress — the tool automatically finds the highest quality that fits under 100 KB. If the result cannot reach 100 KB, open Advanced options and enable Resize image if needed, then compress again. Download when done. Your image is never uploaded to any server.

Select your image, then click the 200 KB preset button. Click Compress — the tool automatically finds the best quality under 200 KB. For photos being sent to AI vision APIs such as GPT-4 Vision, Claude, or Gemini, 200 KB is a practical target that significantly reduces token costs while keeping acceptable quality. If the result cannot reach 200 KB, enable Resize image if needed in Advanced options. Your image never leaves your browser.

FitPhotoKB compresses entirely in your browser using WebAssembly — your image never leaves your device. Select your image, choose a target size, and click Compress. No upload, no account, no server.