Image Conversions, Formats & Optimization Guides

Whether you're looking to understand file types, perform a quick edit, or optimize your entire workflow, our guides have you covered.

Image Conversion

Image Conversion

Step-by-step instructions for converting your images from one format to another.

Image Formats

Image Formats

Learn about JPG, PNG, WebP, HEIC, and SVG to understand their unique strengths.

Image Editing

Image Editing

Practical guides on how to resize, compress, and upscale your images.

Image Optimization

Image Optimization

Master the art of image optimization for websites and social media.


All Guides

Browse through our complete collection of guides, or use the search bar to find exactly what you need.

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HEIC to JPG on Mac, iPhone, and iPad: Convert Apple Photos for Free

HEIC to JPG on Mac, iPhone, and iPad: Convert Apple Photos for Free

Apple’s HEIC format is efficient, but it can be a hassle when you need universal compatibility. As the developer behind FastConverter.app, I’ve he...

How to Convert a PDF to JPG or PNG (A Free & Private Method)

How to Convert a PDF to JPG or PNG (A Free & Private Method)

As the developer behind FastConverter.app, I built these tools to solve my own frustration with converting PDFs to images. I wanted a solution that wa...

How to Batch Convert Images: A Guide to Processing Multiple Files at Once

How to Batch Convert Images: A Guide to Processing Multiple Files at Once

Converting images one by one is a tedious, soul-crushing task. When you have dozens or even hundreds of files, the repetitive cycle of uploading, conv...

The Ultimate Guide to Converting HEIC to JPG

The Ultimate Guide to Converting HEIC to JPG

HEIC photos are everywhere if you use a modern iPhone, but sharing or uploading them can quickly become a headache. As the developer of FastConverter....

How to Convert HEIC to PNG on iPhone (Preserve Transparency and Quality)

How to Convert HEIC to PNG on iPhone (Preserve Transparency and Quality)

If you’ve ever tried to convert an iPhone photo to PNG, you know it’s not just about changing the file extension. As the developer behind FastConv...

How to Convert HEIC to PNG on iPhone (Preserve Transparency and Quality)

How to Convert HEIC to PNG on iPhone (Preserve Transparency and Quality)

If you’ve ever tried to convert an iPhone photo to PNG, you know it’s not just about changing the file extension. As the developer behind FastConv...

HEIC vs JPG: Which Image Format Should You Use?

HEIC vs JPG: Which Image Format Should You Use?

If you’ve ever tried to open a photo from your iPhone on a Windows PC or upload it to a website, you’ve probably encountered the HEIC format. As t...

How to Convert PDF to JPG on Mac: Free, Fast & Private Methods

How to Convert PDF to JPG on Mac: Free, Fast & Private Methods

Need to turn a PDF into JPG images on your Mac? Whether you want to share document pages as images, embed them in presentations, or use them on social...

HEIC to JPG on iPhone: Free & Easy Ways to Convert Your Photos

HEIC to JPG on iPhone: Free & Easy Ways to Convert Your Photos

If you use an iPhone, you’ve probably noticed your photos are saved as HEIC files. While HEIC is efficient, it’s not always compatible with older ...

HEIC to JPG on Windows PC: How to Convert iPhone Photos Easily

HEIC to JPG on Windows PC: How to Convert iPhone Photos Easily

If you’ve transferred photos from your iPhone to your Windows PC, you’ve probably encountered the unfamiliar .heic file extension. While HEIC (Hig...

HEIC to JPG on iPad: Convert Photos for Free and Share Anywhere

HEIC to JPG on iPad: Convert Photos for Free and Share Anywhere

If you use an iPad for photos, you’ve probably noticed your images are saved in the .heic format. While HEIC is efficient for storage, it’s not al...

HEIC vs JPG: Understanding the Differences, Pros, and Cons

HEIC vs JPG: Understanding the Differences, Pros, and Cons

When it comes to digital photos, HEIC and JPG are two of the most important formats you’ll encounter. If you use an iPhone or modern Apple device, y...

How to Convert PNG to JPG, WebP, or AVIF

How to Convert PNG to JPG, WebP, or AVIF

You have a PNG file. It has perfect, crisp quality and supports transparency, which is why you chose it. But now you have a problem: it's too large to...

AVIF vs. WebP vs. JPG: Which Format Will Speed Up Your Website?

AVIF vs. WebP vs. JPG: Which Format Will Speed Up Your Website?

Your images are slowing down your website. Every extra kilobyte adds to the loading time, hurting your Core Web Vitals, damaging your search rankings,...

What is AVIF? A Guide to the Next-Gen Image Format

What is AVIF? A Guide to the Next-Gen Image Format

AVIF (AV1 Image File Format) is a modern, open-source image format designed to provide superior compression and image quality compared to older format...

JPG Files Explained: Why This 30-Year-Old Format Still Rules Photography

JPG Files Explained: Why This 30-Year-Old Format Still Rules Photography

Almost every photo on your phone, every image you see online, and most pictures you've ever shared are probably JPG files. This format has been the ki...

How to Convert PDF to JPG Online (The Fast, Private Method)

How to Convert PDF to JPG Online (The Fast, Private Method)

Converting PDF documents to JPG images is a common task when you need to share document pages as images, embed them in presentations, or use them on s...

How to Convert PDF to PNG Online Free (No File Uploads)

How to Convert PDF to PNG Online Free (No File Uploads)

Converting PDF documents to PNG images is essential when you need the highest quality for text, diagrams, or graphics. While JPG is great for photos, ...

Choosing the Right Image Format: The Complete Guide

Choosing the Right Image Format: The Complete Guide

As the developer behind FastConverter, I've spent countless hours wrestling with image formats. I've seen firsthand how choosing the wrong one leads t...

Are Online Image Converters Safe? A Guide to Browser vs. Server Processing

Are Online Image Converters Safe? A Guide to Browser vs. Server Processing

When you need to convert an image, dozens of websites offer to do it for free. But have you ever hesitated before uploading a personal photo, a client...

SVG Files Explained: Why Vector Graphics Are Perfect for Logos and Icons

SVG Files Explained: Why Vector Graphics Are Perfect for Logos and Icons

You've probably encountered SVG files without even knowing it. Those crisp logos that look perfect on both your phone and your massive 4K monitor? The...

WebP Files Explained: The Modern Format That's Speeding Up the Web

WebP Files Explained: The Modern Format That's Speeding Up the Web

If your website is loading slowly, your image files are too large, or you're failing Core Web Vitals, the WebP format is the solution you need. This m...

How to Compress PNG Files Without Losing Quality

How to Compress PNG Files Without Losing Quality

You chose the PNG format for a reason. You need its perfect, pixel-for-pixel quality and its ability to handle transparent backgrounds—essential for...

Website Image Optimization: A Developer's Checklist

Website Image Optimization: A Developer's Checklist

As the developer of FastConverter.app, I've learned that good website performance is just as important as functionality. My commitment to sound develo...

How to Compress Images for a Faster Website

How to Compress Images for a Faster Website

In the competitive digital landscape, website speed isn't a luxury—it's a necessity. Slow-loading pages frustrate visitors, leading to high bounce r...

How to Reduce Image File Size Without Noticeable Quality Loss

How to Reduce Image File Size Without Noticeable Quality Loss

Shrinking image file sizes is critical for a fast website, but the fear of a blurry, pixelated result makes many people hesitate. How do you make a fi...

How to Optimize Images for Web Performance: A Complete Guide

How to Optimize Images for Web Performance: A Complete Guide

If your website feels slow, there's a high probability that unoptimized images are the culprit. Large image files are the single biggest contributor t...

How to Fix Low-Resolution and Pixelated Images

How to Fix Low-Resolution and Pixelated Images

Have you ever found the perfect image, only to realize it's too small? When you try to enlarge it, it becomes a blocky, pixelated mess. This common pr...

How to Resize Images Without Losing Quality (A Simple Guide)

How to Resize Images Without Losing Quality (A Simple Guide)

Have you ever tried to upload a photo to a website, only to find it cropped awkwardly or taking forever to load? Or perhaps you've needed a specific s...

Lossy vs. Lossless Compression: A Guide to Smart Image Optimization

Lossy vs. Lossless Compression: A Guide to Smart Image Optimization

When you hear that you need to "compress your images" for better website performance, it's not as simple as just making them smaller. Image compressio...

How to Resize Images for Email (A 3-Step Guide to Beating Size Limits)

How to Resize Images for Email (A 3-Step Guide to Beating Size Limits)

You've written the perfect email, attached your photo, and hit send—only to be blocked by an error: "Attachment too large." It's a common frustratio...

How to Create Perfect App Icons for All Platforms in Seconds

How to Create Perfect App Icons for All Platforms in Seconds

You've designed a beautiful logo for your new app or website. Now comes the tedious part: manually creating dozens of slightly different icon sizes to...

How to Convert HEIC to JPG, PNG, & WebP (The Easy Way)

How to Convert HEIC to JPG, PNG, & WebP (The Easy Way)

You took a photo on your iPhone, transferred it to your computer, and now you have a file with a strange `.heic` extension that won't open anywhere. T...

How to Convert SVG to PNG & JPG (And Why You Need To)

How to Convert SVG to PNG & JPG (And Why You Need To)

You have a logo or icon in SVG format. It's infinitely scalable, always looks sharp, and is built on modern web standards. It's the perfect format—u...

How to Convert AVIF Images to JPG, PNG, and WebP for Universal Compatibility

How to Convert AVIF Images to JPG, PNG, and WebP for Universal Compatibility

You have an AVIF image, and for good reason. The AVIF format is a powerhouse, offering incredible compression that results in tiny file sizes with stu...

HEIC Files Explained: Why Your iPhone Photos Won't Open (And How to Fix It)

HEIC Files Explained: Why Your iPhone Photos Won't Open (And How to Fix It)

You took a perfect photo on your iPhone, but when you try to share it or open it on your Windows PC, it won't work. The file ends with ".heic" and man...

PNG Files Explained: When to Use This Quality-First Image Format

PNG Files Explained: When to Use This Quality-First Image Format

When you need an image with perfect, pixel-for-pixel quality and a transparent background, the PNG format is your most reliable choice. It's the undis...