PNG vs JPG: Which Image Format Should You Use?

In the PNG vs JPG choice, use JPG for photographs where small file size matters, and PNG for logos, screenshots, text and anything that needs a transparent background or pixel-perfect edges.

Both formats are raster images made of pixels, and both open everywhere. The difference lies in how they compress data, what they can store and how they age when you edit them. Below you will find a PNG vs JPG table, a plain explanation of lossy and lossless compression, the transparency question, a use-case guide for web, social media and print, and what happens when you convert one format into the other.

PNG vs JPG: the key differences at a glance

The core PNG vs JPG difference is compression: PNG is lossless and keeps every pixel exactly, while JPG is lossy and discards detail the eye barely notices to make files much smaller.

Quick PNG vs JPG rule: if the image came from a camera, start with JPG. If it came from a design tool or a screen capture, start with PNG.

What is a PNG file?

A PNG file is a raster image saved in the Portable Network Graphics format, which compresses pixels losslessly so the decoded image is identical to the original, and can store a full transparency channel.

PNG (pronounced “ping”) was created in the mid-1990s as a patent-free replacement for GIF, whose LZW compression was covered by a patent at the time. PNG 1.0 became a W3C Recommendation on 1 October 1996, and the format was later published as the international standard ISO/IEC 15948:2004. The current W3C PNG specification, the third edition from June 2025, adds official support for animated PNG (APNG), HDR color and Exif metadata.

PNG supports several color types: indexed color with a palette of up to 256 colors, grayscale, and truecolor, each optionally with transparency. Image editors often label these exports as “PNG-8” (palette), “PNG-24” (truecolor) and “PNG-32” (truecolor plus alpha). Those labels are software conventions, not names from the standard, but they are useful shorthand: PNG-8 is tiny and good for simple icons, PNG-24 and PNG-32 handle complex graphics.

What is a JPG file?

A JPG file is an image compressed with the JPEG standard, a lossy method designed for photographs that removes fine detail and color information the human eye is less sensitive to, producing much smaller files.

JPEG is named after the Joint Photographic Experts Group, the committee that wrote it. The JPEG standard was approved in 1992 as ISO/IEC 10918-1 and ITU-T T.81, and more than three decades later it is still one of the most widely supported image formats in cameras, phones, browsers and editors. The extensions .jpg and .jpeg mean exactly the same format; the three-letter version exists because old Windows and MS-DOS file names allowed only three characters after the dot. We explain the details in JPG vs JPEG: is there any difference.

Most editors let you choose a JPG quality level, usually on a 0 to 100 or a 0 to 12 scale. High settings keep photos visually clean at a fraction of the PNG size; low settings create visible blocks, halos around edges and color banding in skies and gradients.

Lossy vs lossless compression: why file sizes differ

Lossless compression (PNG) shrinks a file without changing a single pixel, while lossy compression (JPG) permanently throws away some image data to reach a much smaller size.

PNG uses DEFLATE, the same family of algorithms behind ZIP files. DEFLATE works best when an image has large areas of identical color and repeating patterns, which is why a flat logo or a screenshot of an interface compresses well as PNG. A photograph has natural noise and millions of slightly different pixels, so lossless compression has little to remove and a PNG photo is often several times larger than a good-quality JPG of the same picture.

JPEG splits the image into 8×8 pixel blocks, converts them into frequency data with a discrete cosine transform (DCT) and rounds away the finest details. On a photo the loss is hard to see. On sharp edges, thin lines and text the same process leaves fuzzy halos, which is why a JPG screenshot of a spreadsheet looks dirty next to a PNG one.

The most practical consequence of the PNG vs JPG compression gap is generation loss. Each time you open a JPG, edit it and save it as JPG again, the compression runs again and a bit more detail disappears. Keep a PNG or the original layered file as your master, and export a JPG only as the final delivery copy.

Transparency: why logos need PNG

PNG supports transparency through an alpha channel, so a logo or icon can sit on any background color, while JPG has no transparency at all and always fills empty areas with a solid color.

In any PNG vs JPG decision for brand assets, transparency usually settles it. The alpha channel stores an opacity value for every pixel, from fully transparent to fully opaque. That makes soft edges, drop shadows and anti-aliased curves blend cleanly into whatever is behind them. Save the same logo as JPG and the transparent area turns white (or black, depending on the software), leaving a visible box on any colored website header or slide.

If you must use a JPG on a colored background, match the background in the file itself. Pick the exact color with its code; our guide to HEX color codes shows how to read and copy them. For logos that must scale to any size, a vector format is the better source file; see what an SVG file is and SVG vs PNG for when vectors beat pixels.

Transparency also matters for favicons and app icons. Start from a square PNG of at least 512×512 pixels with a transparent background, and the Favicon Generator will turn it into favicon.ico, Apple and Android icons in one ZIP.

Which is better for web, social media and print?

For websites, use JPG for photos and PNG for graphics with text or transparency; for social media, upload high-quality JPG photos and PNG graphics; for print, export photos as maximum-quality JPG and graphics as high-resolution PNG or PDF.

Websites and the best image format for web

Page speed depends heavily on image weight, so for websites the PNG vs JPG choice is really a speed choice: the best image format for web photos is a compressed JPG (or a modern format such as WebP or AVIF if your site supports it). Use PNG for logos, icons, charts and UI screenshots where crisp edges matter. A common mistake is a hero photo saved as PNG: it looks the same as a JPG but can weigh several times more.

Social media

Social networks usually recompress the images you upload, so a JPG that is already heavily compressed can lose more quality after posting. For social posts, the PNG vs JPG rule is simple: upload photos as high-quality JPG at the size the platform recommends, and use PNG for graphics with text, carousels with typography and screenshots, where recompression artifacts would be most visible.

Print

Printers care about resolution (typically 300 pixels per inch at final size) and color mode more than about PNG vs JPG. A maximum-quality JPG works for printed photos. PNG works for graphics but has no CMYK mode, so many print shops prefer a PDF. Read RGB vs CMYK before you send files to a printer. To combine several JPG or PNG pages into one print-ready document, use JPG to PDF: JPG files are embedded without recompression, so they keep their quality.

PNG vs JPG checklist: which one to choose

Settle PNG vs JPG by content, not by habit: photographs go to JPG, graphics with sharp edges or transparency go to PNG, and anything that will be edited again stays in a lossless master file.

• Photo from a camera or phone: JPG, high quality.
• Logo, icon, favicon: PNG with transparency (or SVG if you have the vector).
• Screenshot, chart, UI mockup, text: PNG.
• Image you will keep editing: PNG or the editor’s native file; export JPG at the end.
• Website hero image: compressed JPG, or WebP/AVIF if supported.
• Print: maximum-quality JPG for photos, PNG or PDF for graphics, 300 ppi at final size.

Converting PNG to JPG and JPG to PNG

Converting PNG to JPG makes the file smaller but removes transparency and adds compression loss, while converting JPG to PNG makes the file larger without restoring any detail the JPG already lost.

Convert PNG to JPG when a photo was saved as PNG by mistake, or when an upload form accepts only JPG. Before you do it, flatten transparent areas onto the background color you want, and choose a quality setting around the top of the scale to avoid visible artifacts.

Convert JPG to PNG only for a specific reason: you plan several rounds of editing and want to stop further generation loss, or you need to add transparency after removing the background. Renaming a .jpg file to .png does not convert it; the data stays JPEG and some programs will refuse to open it.

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