Free Online Image Converter
Free Online Image Converter
Micro PDF’s image conversion tool enables seamless interchange between popular image formats—including JPG, PNG, WebP, BMP, and GIF—while allowing you to adjust output quality, compression level, and dimensions. The converter preserves essential image details and supports batch processing, making it ideal for designers, developers, and everyday users managing image assets or resolving format compatibility issues.
Whether you need to compress photo file sizes or create transparent-background icons, Micro PDF delivers fast, high-quality conversions. Free users can perform basic format conversions to meet daily needs—no registration required.
Table of Contents
- Key Features
- How to Use Micro PDF for Image Conversion
- Format Characteristics & Conversion Tips
- Quality & File Size Optimization
- Cross-Platform Support & Batch Processing
- Frequently Asked Questions
Key Features
- Multi-format conversion: Supports bidirectional conversion between JPG ↔ PNG, PNG ↔ WebP, JPG ↔ WebP, and more—covering over 90% of common use cases.
- Adjustable quality: Set output quality from 0–100% to balance clarity and file size (e.g., 80% JPG quality reduces file size by ~50% with minimal visual loss).
- Batch processing: Convert up to 50 images at once; output files are automatically named with original filenames plus new extensions (e.g.,
img.jpg→img.png). - Free & unlimited: Free conversions for images under 10 MB per file, with no daily usage limits for basic format support.
- Metadata retention: Option to preserve EXIF data (e.g., capture time, device info)—ideal for photo organization.
How to Use Micro PDF for Image Conversion
Converting images with Micro PDF takes just three simple steps:
- Go to the Micro PDF website: Micro PDF and click the Image Converter tool.
- Upload your images: Click “Choose Images” or drag and drop files (mixed formats supported; max 50 files per batch).
- Configure conversion settings:
- Output format: Select target format (JPG / PNG / WebP / BMP)
- Quality: Adjust slider (default: 80%; WebP supports 0–100%)
- Advanced options: Check “Keep EXIF” (off by default) or “Auto-rotate” (corrects orientation based on metadata)
- Click Start Conversion, then download the ZIP archive containing all converted images.
Format Selection Tips
- Photographs: Use JPG (70–90% quality) for optimal balance of quality and file size—perfect for social media or photo albums.
- Transparent graphics: Choose PNG (lossless) or WebP (smaller file size with transparency) for logos, icons, or UI elements.
- Web content: WebP (60–80% quality) reduces image size by 30%+ compared to JPG, speeding up page load times.
Format Characteristics & Conversion Tips
| Format | Key Advantages | Recommended Use | Avoid When |
|---|---|---|---|
| JPG | High compression, small file size, ideal for photos | Convert from PNG/WebP at 70–90% quality to avoid blur | Transparency is needed (e.g., icons) |
| PNG | Lossless, supports transparency, larger files | Best when editing transparent layers or preserving sharp edges | Storing large photos (slow loading due to size) |
| WebP | Excellent quality-to-size ratio; supports transparency & animation | Ideal for websites, mobile apps, and modern platforms | Targeting legacy systems with limited WebP support |
| BMP | Fully lossless, maximum compatibility, very large files | Only for archival or professional printing where size isn’t a concern | Web use or everyday sharing (inefficient) |
Quality & File Size Optimization
| Output Format | Quality Setting | Approx. File Size | Best For |
|---|---|---|---|
| JPG | 90–100% | 80–100% of original | High-res printing, detail-critical work |
| JPG | 50–80% | 20–50% of original | Social media, web thumbnails |
| PNG | Lossless (no slider) | 50–100% (content-dependent) | Transparent icons, design assets |
| WebP | 70–80% | 30–60% of original | Mobile apps, responsive websites |
Cross-Platform Support & Batch Processing
Micro PDF works across all major platforms:
- Web browser: Convert local images in bulk—great for organizing design libraries or standardizing formats.
- Mobile: Use the Micro PDF WeChat Mini Program to convert photos right after capture.
- Desktop app: Process entire folders at once; outputs are auto-sorted by format—perfect for managing large image collections.
Frequently Asked Questions
1. Why does my JPG-to-PNG file become much larger?
This is normal. PNG is lossless and supports transparency, often resulting in 2–5× larger files than JPG. If transparency isn’t needed, stick with JPG.
2. Can free users convert to/from WebP?
Yes! Free users can convert WebP ↔ other formats, but are limited to 10 images per batch. VIP users enjoy unlimited batch sizes and WebP animation support.
3. Colors look off after conversion—how to fix?
Enable “Preserve Color Profile” in advanced settings to retain the original color space and minimize shifts.
4. Can I resize images while converting formats?
Yes—but only for VIP users. Check “Resize Image” and enter target dimensions (with proportional scaling option).
5. What happens to animated GIFs during conversion?
Only WebP preserves animation (enable “Keep Animation”). Converting to JPG/PNG/BMP saves only the first frame.
6. My converted image looks blurry or pixelated—what should I do?
- Increase quality setting (e.g., from 50% to 80%)
- Avoid re-converting the same image multiple times
- Use PNG for lossless workflows when quality is critical
7. Can I convert images larger than 10 MB?
Free users: max 10 MB per image.
VIP users: support up to 50 MB, plus “Large Image Optimization” (auto-downscales resolution to reduce size).
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