What Is an Image File Format? JPG, PNG, WebP and More
October 31, 2026
An image file format is a set of rules for storing pixels as bytes. See what the first bytes reveal, how six formats differ, and how to pick one.
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Practical guides to image formats, converting between them and choosing the right one.
How to Convert HEIC to JPG (Safari 17+ Required)
October 31, 2026
Step-by-step HEIC to JPG conversion in the browser, why it only opens in Safari 17 or newer, and what to do when your browser says it cannot read the file.
HEIC vs JPEG: Comparison and When to Use Each
October 31, 2026
HEIC stores photos more efficiently, JPEG opens almost everywhere. Compare the two side by side and get clear rules for choosing between them.
Convert PNG to JPG with Minimal Visible Quality Loss
October 31, 2026
Convert PNG to JPG and keep it looking right: when the file shrinks, when it grows, which quality value to use, with measured byte sizes from test images.
How to Convert JPG to PNG (and What It Cannot Fix)
October 31, 2026
Turn a JPG into a PNG for editors, forms and repeated saves. Learn what stays, what does not improve, and how much bigger the PNG gets, with measured sizes.
How to Convert WebP to JPG or PNG
October 31, 2026
Why saved web images turn out to be WebP, how to check the real format, and how to convert WebP to JPG or PNG with sizes from a measured test.
How to Convert Images to WebP (and When Not To)
October 31, 2026
Convert JPG or PNG to WebP for lighter web pages. Steps, quality choices, what this tool's lossy WebP means for logos, and measured sizes from test images.
How to Convert SVG to PNG or JPG at the Right Size
October 31, 2026
Turn an SVG into a sharp PNG or JPG: size units, viewBox, missing fonts, cropping and blur explained, with pixel math for screens and print.
How to Convert GIF to PNG or JPG (First Frame Only)
October 31, 2026
Convert a GIF to PNG or JPG, and learn why only the first frame is kept for animated GIF, PNG, WebP and AVIF, and which output suits flat or photo GIFs.
How to Convert BMP to JPG or PNG, With the Size Math
October 31, 2026
Convert old BMP files to JPG or PNG, see why a BMP is exactly 54 plus rows times padded row bytes in size, and learn what 24-bit and 32-bit BMPs mean.
How to Convert AVIF to JPG or PNG
October 31, 2026
Convert AVIF images to JPG or PNG when an editor or form will not accept them. Browser support, why the output is much bigger, and which format to pick.
How to Make a Favicon (ICO) from a PNG: Sizes and Tags
October 31, 2026
Turn a PNG into a favicon.ico, learn which icon sizes a site needs (16, 32, 48, 180, 192, 512), what this converter can do, and the HTML link tags to use.
JPEG vs PNG: Which Format to Choose for Each Image
October 31, 2026
JPEG or PNG? Decide by edges, transparency and destination, with measured file sizes from two synthetic test pictures and rules for the awkward cases.
PNG vs WebP: Size, Quality and Browser Support
October 31, 2026
PNG is always exact; WebP can be lossy or lossless. Compare measured file sizes, color depth, support and limits, then pick by scenario.
Lossy vs Lossless Images: What Gets Thrown Away
October 31, 2026
How JPEG throws data away (chroma subsampling, 8x8 blocks, quantisation) and how PNG keeps it all, with the arithmetic on a 1920 x 1080 picture.
Transparent PNG to JPG: How Background Color Works
October 31, 2026
JPEG cannot store transparency, so see-through pixels must become a solid color. See the pixel math, choose the right background, avoid halos.
Why a Converted Image Gets Bigger: The Numbers
October 31, 2026
Your converted file is larger than the original? Pixel arithmetic and exact byte counts from synthetic test encodes show which conversions grow and why.
Image Quality After Converting: How to Test and Set It
October 31, 2026
Learn what a format change keeps or loses, test a quality setting on your own file in five steps, and see how repeated saves add up, with measurements.
Color Profiles and sRGB When Converting Images
October 31, 2026
What an ICC color profile does, a worked Display P3 to sRGB example, what happens to wide-gamut photos on conversion, and how to diagnose dull or neon colors.
EXIF Metadata and Privacy When Converting Images
October 31, 2026
What EXIF and GPS data hides in a photo, what happens to it when you convert, why orientation is the exception, and when losing metadata causes problems.
Convert Many Images at Once: Batch, ZIP and File Names
October 31, 2026
Convert up to 100 images in one go, see how output files are named, what the ZIP contains, and how to handle mixed or very large batches.
Choosing the Right Image Format for a Website
October 31, 2026
Pick formats by image type: photos, screenshots, logos, transparency. Includes measured sizes on synthetic test images and pixel math for display size.
Best Image Formats for Email and Messaging Apps
October 31, 2026
JPEG is the safe choice for photos in email and chat. See stated attachment limits, how encoding inflates size, and scenarios for photos and screenshots.
Image Formats and Pixel Sizes for Printing
October 31, 2026
How many pixels a print needs at 300 ppi, why JPEG and PNG are fine for most photo prints, and when TIFF, PDF or CMYK come into play.
Image Formats for Social Media Uploads
October 31, 2026
Platforms re-compress what you upload. Learn which formats and sizes avoid blur and rejections, with scenarios for photos, text graphics and profile images.
Why a Website or Form Rejects Your Image File
October 31, 2026
Work through the usual causes of a rejected image upload in order: format, file size, pixel size, color mode, wrong extension, metadata and HEIC.
iPhone Photo Formats: HEIC, JPEG and Settings
October 31, 2026
Where the iPhone chooses between HEIC and JPEG: the Camera Formats setting, sharing behavior, USB transfers and iCloud Photos, using the menu names Apple documents.
Convert Images on Android, Windows and Mac
October 31, 2026
What Preview on Mac and Paint on Windows can convert, what Android does not offer built in, and when a browser-based converter is the better route.
How Browser-Based Image Conversion Works
October 31, 2026
Follow a file through decode, canvas and encode inside your browser, learn why nothing is uploaded, and see how the 16.8 megapixel limit plays out.
Common Image Conversion Mistakes and How to Avoid Them
October 31, 2026
The mistakes that waste quality, size or time when converting images, each with the reason it happens and a fix that links to the detailed guide.