Compress PNG Images
Preserve transparency and shrink file size drastically — 100% offline.
Drag & drop PNG files here or
Supports: PNG · Max 200 files · 1 GB total
Free Online PNG Compressor – ConvertorLab
Welcome to ConvertorLab’s free PNG Compressor — the fastest way to compress PNG images, reduce PNG file size, and shrink large image files without sacrificing clarity or transparency. Whether you’re a designer, photographer or everyday user, our tool processes files right in your browser — no uploads, no watermarks, no registration.
Whether you need to compress an image to under 20 KB, optimize a PNG for web or email, reduce picture size for sharing, or maintain transparent backgrounds while shrinking file size — ConvertorLab delivers crisp output with dramatically smaller file sizes. Use our tool to compress PNG online, reduce image size in KB, shrink picture size for web/mobile.
Fast · Private · Transparency‑Friendly
All processing happens locally in your browser — your images never leave your device, making this one of the most secure PNG compression tools online. ConvertorLab uses smart compression algorithms to maintain transparency, colour fidelity and sharpness even while reducing file weight. Perfect for website graphics, email attachments, portfolios and more.
Skip heavy desktop editors or upload‑only services. With ConvertorLab you simply select your image — instantly compress PNG files (and other formats) free, private, and optimized for both size and quality.
How to Use the PNG Compressor
- Click the Choose Files button (or drag & drop) and select your PNG image(s).
- Choose your compression mode or set a target size (e.g., KB) and optionally quality level.
- Preview the compressed image and check file‑size reduction and visual clarity.
- Click Download to save the optimized image(s).
- You can compress multiple images at once — batch mode is supported.
Common Uses for Our PNG Compressor
- Optimizing website graphics, icons or hero images for faster page loads.
- Reducing image size for email attachments, social media, and messaging apps.
- Preparing transparent background PNGs for presentations, proposals or portfolios.
- Compressing high‑resolution photos or screenshots to smaller shareable files.
- Making images lighter to upload to forms, blogs or mobile apps without losing clarity.
About PNG Files and Compression
PNG (Portable Network Graphics) is a widely used image format — especially when transparency or high colour fidelity is required. However, large PNG files (such as layered screenshots or high‑res graphics) can become slow to load or exceed upload limits.
That’s why you might need to compress PNG online, reduce image size in KB, or shrink image for web or email. With ConvertorLab you can optimize the file size while preserving transparency, colour accuracy and sharpness — all in one simple step.
Key Features of ConvertorLab’s PNG Compressor
- No uploads required: All compression happens inside your browser.
- Transparency preservation: Keeps transparent backgrounds intact even after compression.
- Adjustable compression: Choose quality level, target size or mode (balanced vs max).
- Batch processing: Compress multiple images at once effortlessly.
- Fast & lightweight: Works on desktop and mobile devices without installation.
- Supports web‑ready formats: PNG, and optionally convert to WebP or smaller if needed.
- Free to use: No registration, no watermarks, no hidden costs.
Original vs Compressed Image – What Changes?
Original PNG: High file size, full resolution and possibly transparency — often too large for fast sharing or web performance. Compressed PNG: Significantly smaller file size with visual fidelity preserved — optimized for sharing, web use and performance.
With ConvertorLab you get images that look just as sharp and clear — while dramatically reducing file size and loading time.
Frequently Asked Questions
1. Will compressing a PNG reduce image quality?
No — our PNG Compressor uses advanced algorithms to reduce file size while maintaining visual clarity, detail and transparency.
2. Are my images uploaded to a server?
No. All compression happens locally in your browser — your files stay on your device and full privacy is maintained.
3. Can I compress a PNG to a specific size (e.g., under 20 KB)?
Yes — you can set a target size or quality level, and our tool will process accordingly to shrink the image to the desired size.
4. Does the tool work on mobile devices?
Yes — the PNG Compressor is fully compatible with iPhone, Android, tablets and desktops.
5. Can I compress multiple images at once?
Yes — batch mode is supported so you can process several images together for efficiency.
6. Is this tool free to use?
Yes — completely free with no registration, no watermarks and no software installation required.
7. Does transparency get preserved after compression?
Yes — if the original image has transparent backgrounds (PNG), our tool retains that transparency even after compression.
Why Image Compressor by ConvertorLab?
Compress Any Image or PDF
ConvertorLab lets you compress all popular file types — from JPG, PNG, and WebP to PDF. Whether you want to reduce image size, compress PDF documents, or shrink large photos, our smart compressor handles it all directly in your browser without losing quality or details.
Fast, Secure & 100% Private
All compression happens locally — no uploads, no waiting, no tracking. Your files never leave your device, ensuring complete privacy. ConvertorLab’s advanced compression engine instantly reduces PDF size and minimizes photo files while keeping them secure and professional.
High Quality, Small Size
Enjoy crystal-clear results even after compression. Our intelligent optimizer reduces image resolution or shrinks PDF files without affecting clarity. Get the perfect balance between file size and quality — ideal for web, email, or printing.
Your Data. Your Privacy. Fully Protected.
At Convertor Lab, your files never leave your device. Every image, document, or PDF you process is handled entirely within your browser using secure client-side technology. This means no uploads, no tracking, and no external storage — ever.
We do not collect, view, or save any of your files or personal information. All conversions, compressions, and edits happen locally using trusted browser APIs (HTML5 & JavaScript). Once you close the page, everything is gone — instantly.
This private-by-design approach keeps your creative work and personal data
completely safe. Whether you’re converting a single photo or managing a PDF
project, you remain in full control at all times.
Convertor Lab — where performance meets privacy.