Image Compressor – Free Online Tool
Free online image compressor with quality slider, target size mode, format conversion (JPEG/PNG/WebP), batch processing, and before/after comparison. 100% client-side — your images never leave your device.
The Most Powerful Free Image Compressor
Our image compressor goes far beyond basic optimization. It features a precision quality slider (10-100%), exact target size mode for government portals, one-click format conversion between JPEG/PNG/WebP, batch processing for multiple images, and a visual before/after comparison slider — all running 100% in your browser. No file uploads, no server processing, no privacy risks.
Client-Side Image Compression Technology
We use the HTML5 Canvas API and the browser-image-compression library to process your images entirely on your device. The Canvas API re-renders your image at the chosen quality level and format, while the compression library handles intelligent target-size matching by dynamically balancing quality and dimensions. Your photos never leave your computer.
Why Choose ToolsMint Over TinyPNG or Squoosh
Unlike TinyPNG, we never upload your files to any server — complete privacy guaranteed. Unlike Squoosh, we offer batch processing for multiple images, target size mode for exact KB limits, format conversion with size estimates, and compression presets. We combine the simplicity of TinyPNG with the power of Squoosh, plus unique features nobody else offers.
Who Benefits From This Image Compressor
Students and job applicants compressing ID photos for government portals (50KB/100KB limits), web developers optimizing images for faster page loads, social media managers preparing content for multiple platforms, photographers reducing file sizes for client delivery, and anyone who needs to compress an image for email attachments — all while keeping their photos completely private.
How to Use Image Compressor
- 1
Upload your image by dragging it onto the upload zone or clicking to browse
- 2
Choose your compression mode — use the quality slider for visual control, or switch to Target Size mode and enter your desired KB limit
- 3
Optionally convert format (JPEG, PNG, WebP), resize dimensions, or apply a preset (Email, Web, Social Media, Passport)
- 4
Click Compress and compare the result with the before/after slider
Frequently Asked Questions
Everything you need to know about the Image Compressor.
Is this image compressor really free and unlimited?
Yes, completely free with no daily limits, no file size restrictions, and no watermarks. Because everything runs in your browser using your device's processing power, there are no server costs. Compress as many images as you want, as many times as you want.
How accurate is the target size mode?
The target size mode uses an intelligent algorithm that dynamically adjusts quality and dimensions to hit your specified file size. It typically achieves within 5% of your target. For very aggressive targets (e.g., 10MB photo to 20KB), some visual quality loss is inevitable but the tool will always get as close as possible.
What image formats are supported for conversion?
You can compress and convert between JPEG, PNG, and WebP formats. WebP typically produces 25-35% smaller files than JPEG at equivalent quality. Each format button shows an estimated output size before compression so you can compare. PNG output ignores the quality slider since PNG is a lossless format.
Is my image data completely private and secure?
Absolutely. Your images never leave your device — all processing happens locally in your web browser using JavaScript and the Canvas API. We have no servers that receive, store, or process your files. This makes our tool ideal for sensitive images like ID documents, medical records, and personal photos.
Can I compress multiple images at once?
Yes! Switch to batch mode and upload multiple images at once. Each image is compressed with the same settings and shows individual compression stats. You can download each compressed image individually. Batch mode supports up to 20 images at a time.
Does compression remove EXIF metadata from my photos?
By default, yes — the Canvas API re-export process inherently strips EXIF data (camera info, GPS location, dates). This is actually a privacy benefit. The tool shows your EXIF data before compression so you can see what will be removed. If you need to preserve metadata, keep the original file as backup.