JPG vs PNG vs WEBP: Which Image Format Should You Use?

Why the format matters

The same picture can be saved in different formats, and the choice affects three things: how large the file is, how sharp it looks, and whether a website or app will accept it. A screenshot that looks crisp as a PNG can turn fuzzy around the text when saved as a low quality JPG. A family photo saved as PNG can be several times larger than the same photo as a JPG, with no visible benefit.

You do not need to understand the technical details to choose well. Knowing what each format is good at, and what it is bad at, is enough for everyday work like filling forms, sending documents on WhatsApp or adding images to a website.

JPG: the everyday choice for photos

JPG, also written JPEG, uses lossy compression. It throws away fine detail that the eye is unlikely to notice, which keeps photos small. That is why phone cameras, scanners and most websites use it by default. You can usually choose a quality level: higher quality means a larger file, lower quality means a smaller file with more visible blockiness.

The trade-off is that JPG is poor at sharp edges and flat colours. Text, lines and logos can get faint smudges around them, often called artefacts. JPG also cannot store transparency, so any transparent area becomes a solid colour, usually white. Each time you edit and save a JPG again, a little more quality is lost.

• Best for: photographs, scanned photos, passport and exam photos
• Avoid for: logos, screenshots full of text, images that need a transparent background

PNG: sharp edges and transparency

PNG uses lossless compression, which means nothing is thrown away. Every pixel is kept exactly as it was. This makes PNG ideal for screenshots, diagrams, charts, logos and anything with text, because edges stay perfectly sharp.

PNG also supports transparency. A shop logo saved as PNG with a transparent background can be placed on a coloured banner or an invoice template without a white box around it. The downside is size. A detailed photo saved as PNG is usually much larger than the same photo as a JPG, which makes it a poor choice when a form has a strict KB limit.

• Best for: screenshots, logos, icons, diagrams, images with text
• Avoid for: large photos where file size matters

WEBP: smaller files for the web

WEBP is a newer format designed for websites. It can work in a lossy mode like JPG or a lossless mode like PNG, and it supports transparency. For the same visible quality, WEBP files are often smaller than JPG or PNG, which helps web pages load faster on mobile data.

All modern browsers can display WEBP, but support elsewhere is uneven. Some older photo viewers, office software and many government or exam portals do not accept it. You may also find that an image saved from a website arrives as WEBP when you expected a JPG, which is why people often search for how to convert WEBP to JPG.

Form portals that accept only JPG

Many application portals for exams, scholarships and government services accept only JPG or JPEG for the photo and signature, and PDF for documents. If you upload a PNG or WEBP, the form may show an error, or it may accept the file but fail later at verification. Read the allowed formats in the instructions and follow them exactly.

To change the format, use the Filyzo Image Converter. Select one or more JPG, PNG or WEBP files, choose the output format and a quality level (Best, High or Smaller file for JPG and WEBP), and download the result. Several images come back together in one ZIP. If the form also has a KB limit, Resize Image to KB always produces a JPG and lets you set a maximum size and, optionally, a width and height in pixels, so you can handle both the format and the size in a single step.

Quick guide to choosing

When in doubt, think about what the image contains and where it is going. The examples below cover most everyday situations.

• Exam or job form photo and signature: JPG, unless the notice says otherwise
• Screenshot of a payment confirmation or error message: PNG, so the text stays readable
• Shop logo for an invoice or letterhead: PNG with a transparent background
• Product photos for your own website: WEBP or JPG, kept small for faster loading
• Sharing photos with family on WhatsApp or email: JPG
• Image saved from a website that a form refuses: convert it to JPG