Frequently Asked Questions

What is FastConverter?

FastConverter is a free online tool that allows you to quickly and easily convert your images to different formats such as PNG, JPEG, WEBP, GIF, or BMP. All conversions happen directly in your browser, ensuring your privacy and security.

Is FastConverter free to use?

Yes, FastConverter is completely free to use with no hidden charges, subscriptions, or premium tiers. There are no watermarks added to your converted images, and no registration is required.

Do I need to install any software?

No, FastConverter is a web-based tool that works entirely in your browser. All you need is a modern web browser like Chrome, Firefox, Safari, or Edge. No downloads, installations, or plugins required.

How many files can I convert at once?

You can convert up to 12 image files at a time using our batch conversion feature. This allows for efficient processing of multiple images while maintaining optimal performance.

What makes FastConverter different from other converters?

FastConverter prioritizes your privacy by processing everything locally in your browser. Unlike many other services, we don't upload your files to servers, add watermarks, or require account creation. It's fast, secure, and completely free.

Are my images uploaded to a server?

No, all image processing is done locally in your web browser using HTML5 Canvas technology. Your images are never uploaded to our servers or any third-party servers, ensuring your files remain completely private and secure on your device.

Is it safe to use FastConverter for confidential images?

Absolutely. Since all processing happens locally in your browser, FastConverter is ideal for converting confidential, sensitive, or proprietary images. Your files never leave your device, making it perfect for business documents, personal photos, or any sensitive content.

Do you store any data about my conversions?

No, we don't store any information about your file conversions, file names, or usage patterns. We don't use tracking cookies or analytics that could compromise your privacy. Your activity remains completely anonymous.

Can I use FastConverter offline?

Once the page is loaded, many conversion features can work offline since the processing happens in your browser. However, you'll need an internet connection to initially load the tool.

What image formats can I upload?

FastConverter supports all major image formats for upload including: JPG/JPEG, PNG, GIF, WEBP, BMP, TIFF, SVG, and HEIC (iOS photos). Most modern image formats are compatible with our conversion tools.

What formats can I convert to?

You can convert images to JPG, PNG, WEBP, GIF, and BMP formats. Each format has specific use cases - JPG for photos, PNG for graphics with transparency, WEBP for web optimization, and GIF for simple animations.

Does FastConverter maintain image quality?

Yes, FastConverter uses high-quality conversion algorithms to preserve as much image quality as possible. For lossless formats like PNG, quality is maintained perfectly. For lossy formats like JPG, you get the best possible quality within the format's constraints.

Can I convert HEIC photos from my iPhone?

Yes! FastConverter supports HEIC format, which is the default photo format on modern iPhones. You can easily convert HEIC photos to JPG or PNG for better compatibility across devices and platforms.

Does the app icon generator work for all platforms?

Yes, our app icon generator creates complete icon sets for iOS (iPhone and iPad), Android (all density levels), and web/PWA applications. It generates properly sized and named icons ready for app store submission and deployment.

What's the maximum file size I can convert?

Most images under 50MB can be processed efficiently. Very large files may take longer to process but will still work. For optimal performance, we recommend images under 20MB per file.

Why do conversions take different amounts of time?

Conversion time depends on several factors: image size, resolution, format complexity, and your device's processing power. Larger, high-resolution images naturally take longer to process than smaller ones.

Which browsers work best with FastConverter?

FastConverter works on all modern browsers including Chrome, Firefox, Safari, and Edge. For the best performance, we recommend using the latest version of Chrome or Firefox, which have the most optimized Canvas processing.

Can I use FastConverter on mobile devices?

Yes! FastConverter is fully responsive and works great on smartphones and tablets. You can convert images directly on your mobile device, including photos taken with your phone's camera.

Why might my browser feel slow during conversion?

Image processing is computationally intensive. During conversion, your browser uses significant CPU resources for the calculations. This is normal and temporary - performance returns to normal once conversion completes.

Why is my conversion failing?

Common causes include: corrupted image files, unsupported formats, extremely large file sizes, or browser compatibility issues. Try using a different image or browser, and ensure your image file isn't damaged.

What should I do if the page becomes unresponsive?

If processing very large images, your browser might become temporarily unresponsive. Wait a few moments for processing to complete. If the issue persists, try refreshing the page and using smaller images or fewer files at once.

Why don't I see the download button?

The download button appears only after conversion is complete. If you don't see it, the conversion might still be processing, or there might have been an error. Try refreshing the page and converting again.

My converted image looks different. Why?

Different image formats have different characteristics. Converting from PNG to JPG removes transparency, converting to WEBP might reduce file size, and format limitations can affect appearance. This is normal behavior based on format specifications.

Can I recover a file if I accidentally close the page?

Unfortunately, since all processing happens locally in your browser, closing the page or refreshing will lose any converted files that haven't been downloaded. Always download your converted images immediately after conversion.

How do I choose the right output format?

Use JPG for photos and images with many colors, PNG for graphics with transparency or sharp edges, WEBP for web images needing smaller file sizes, and GIF for simple animations or graphics with few colors.

How can I reduce file size when converting?

Convert to WEBP for the smallest file sizes with good quality, or use JPG for photos. Avoid PNG for photographs as it typically creates larger files. Consider the trade-off between file size and quality for your specific needs.

What's the best format for web use?

WEBP offers the best compression for web use while maintaining good quality. However, for maximum compatibility across all browsers and devices, JPG (for photos) and PNG (for graphics) are still reliable choices.

How do I prepare images for app icon generation?

Use a square image (1:1 aspect ratio) with at least 1024×1024 pixel resolution. Ensure your design is simple and recognizable at small sizes. Use transparent PNG backgrounds for maximum flexibility across platforms.

Should I keep my original files?

Yes, always keep your original high-quality files. Converted files may have different characteristics than originals, and you might need the originals for future conversions or different use cases.