Toolivaro

Free JPG, PNG & WebP Converter

Convert images between JPG, PNG, and WebP with a quality control — locally, with live size and dimension stats.

Processed locally in your browser

How is the result calculated?

Converting a 1.4 MB PNG to WebP for the web

A PNG screenshot with some transparency is 1.4 MB. Converting to WebP at 80% quality typically produces a 250–400 KB file — a 70–80% saving with visually identical output on screen. Converting the same PNG to JPG loses the transparency and still lands larger than WebP, which is why WebP is the default recommendation for web images.

Input Value
image 1.4 MB PNG with transparency
format webp
quality 80
Result ≈ 250–400 KB WebP (−70% to −80%)

What is the formula and its assumptions?

Conversion method

output = decode(input) → encode(target format, quality)

Symbol Meaning
decode pixel-accurate decode of the source image
encode re-encode in the target format at the chosen quality

Conversion is lossy for JPEG and WebP at typical qualities, and lossless for PNG — the tool always shows the resulting file size so the trade-off is visible.

Transparency handling

PNG → JPEG: transparency replaced with white

Symbol Meaning
white the fill color for transparent pixels

What are the most common mistakes?

  • Converting JPG to PNG expecting quality recovery — lossy data stays lost; the file just gets bigger.
  • Converting a transparent PNG to JPG and losing the transparency — WebP or PNG keeps it.
  • Using an online converter that uploads the image — this tool converts entirely on your device.

What are the assumptions and limitations?

  • Animated GIFs are converted to a single frame.
  • JPEG output fills transparency with white; no alpha-channel JPEG exists.
  • Input is limited to 25 MB to keep processing responsive.

Where do the numbers come from?

Last reviewed August 4, 2026 · Version 1.0.0 · Toolivaro does not guarantee external content.

Image Image Compressor Compress JPG and WebP images with a quality slider, live size savings and dimensions, processed fully on your device. Image Image Resizer Resize JPG, PNG, WebP, and GIF images to any maximum dimension, preserving aspect ratio — on your device.

Frequently asked questions

Which format should I choose?

WebP for the web: best size for photos and graphics, supported by every modern browser. PNG when you need transparency or lossless detail. JPG when compatibility is the priority — email, legacy systems, and most marketplace uploads.

What happens to transparency when converting PNG to JPG?

JPG cannot represent transparency, so the converter fills transparent pixels with white and notes it on the page. If you need to keep transparency, convert to WebP or PNG instead.

Why does my JPG get bigger when converted to PNG?

PNG is lossless, so converting a lossy JPEG to PNG cannot recover detail — it only produces a larger file. Convert to PNG only when the source is already lossless (PNG, or a freshly rendered image).

Found a mistake or have a correction? Report it — we review every correction.