Free Online Image Resizer & Compressor: JPG, PNG & WebP
Large image files slow down website loading times, exceed email attachment limits, and fail upload validation on government job portals and passport application systems. The TechTools Free Online Image Resizer allows you to change pixel dimensions, maintain aspect ratios, compress file size in kilobytes (KB), and convert file formats directly in your web browser. With zero software installation and 100% private local execution, it is the ideal utility for web developers, photographers, students, and digital creators.
How to Resize Images Online in 4 Simple Steps
- Upload Your Image: Drag and drop your image (PNG, JPG, or WebP) into the upload container, or click to browse files from your computer or phone.
- Set Your Target Dimensions: Enter your desired Width and Height in pixels. Keep the Aspect Ratio Lock (🔒) enabled to prevent image distortion.
- Choose Format & Compression Quality: Select whether you want the output format as JPG, PNG, or WebP, and adjust the quality slider to reach your desired file size in KB.
- Download Instantly: Click Resize & Download to save the optimized image to your device immediately.
Key Benefits for Creators, Students & Webmasters
- 100% Client-Side Privacy: Your personal photos, ID scans, and client assets are processed entirely within browser memory and are never uploaded to any remote server.
- Aspect Ratio Lock Protection: Ensures your photos and banners never look squished or stretched out of proportion.
- Perfect for Portal Uploads: Easily resize photos and signature scans to exact pixel dimensions (e.g. 200x230, 300x300) required by government portals and admission forms.
- Web Performance Optimization: Convert heavy PNG files to lightweight modern WebP or optimized JPG to dramatically boost Core Web Vitals and Google PageSpeed scores.
Frequently Asked Questions (FAQ)
Does resizing an image reduce its quality? ▼
TechTools uses high-quality bicubic canvas interpolation, allowing you to resize image dimensions while maintaining maximum visual sharpness and clarity. You can also adjust the JPEG/WebP output quality slider to balance clarity with file size.
What is Aspect Ratio Lock and why should I use it? ▼
Aspect Ratio Lock keeps the proportional relationship between the width and height of an image. When locked, changing the width automatically recalculates the height, preventing your image from looking stretched or distorted.
Can I resize images for passport forms, job portals, and social media? ▼
Yes. The tool includes quick dimension presets for social media banners, YouTube thumbnails, passport photo requirements, and government portal uploads with strict KB size limits.
Are my photos uploaded to a cloud server? ▼
No. Everything runs 100% inside your browser using HTML5 Canvas. Your photos never leave your device.
What image formats are supported? ▼
TechTools Image Resizer supports all major image formats including PNG, JPG/JPEG, WebP, GIF, and BMP.