METINASBy METINAS

Best free online Image Converter & Optimizer

Bulk convert PNG, JPG, and WebP to next-gen formats like AVIF and WebP. Fast, secure, and high-quality compression.

Why choose us

Everything you need. Nothing you don't.

Lightning Fast

Images are processed instantly on high-performance servers. No waiting around.

Secure & Private

Your images are never stored. Everything is processed in memory and discarded.

Bulk Processing

Drop dozens of files at once and download them all in a single ZIP archive.

Next-Gen Formats

Convert to WebP and AVIF for up to 80% smaller files with no quality loss.

No Signup Required

Start converting immediately. No account, no email, no strings attached.

100% Free

No hidden fees, no watermarks, no file limits. Completely free to use.

Simple process

How it works

Converting and optimizing your images takes three steps and less than a minute — no software to install, no account needed.

01

Upload Your Images

Drag and drop your PNG, JPG, or WebP files directly onto the converter, or click to browse. You can upload dozens of files at once — there is no limit.

02

Choose Output Format

Select your target format: WebP for broad browser support or AVIF for the smallest possible file size. Adjust quality with a simple slider.

03

Download & Deploy

Your optimized images are ready in seconds. Download them individually or grab all files at once as a ZIP archive — ready to drop straight into your project.

SEO & performance

Why image optimization matters for your website

Images are the biggest performance bottleneck

On average, images account for over 50% of a webpage's total byte weight. Unoptimized images slow down page load times, increase bandwidth costs, and frustrate visitors — especially on mobile networks. Simply switching from PNG or JPEG to WebP or AVIF can cut image payload by 50–80% with no visible quality difference.

Google rewards fast pages

Page speed has been a Google ranking signal since 2010, and it became even more important with the introduction of Core Web Vitals in 2021. The Largest Contentful Paint (LCP) metric — which measures how fast the main content of a page loads — is almost always dominated by a hero image or product photo. Optimizing that single image can move your LCP from "Poor" to "Good" and directly improve your search rankings.

WebP vs AVIF vs JPEG: which format to choose?

JPEG is the legacy standard — universally supported but inefficient. WebP is Google's answer: 25–35% smaller than JPEG at the same quality, supported by all modern browsers, and a safe default for any web project. AVIF is the next evolution: up to 80% smaller than JPEG, with better handling of gradients and fine detail. It is now supported by Chrome, Firefox, and Safari, making it viable for production use today.

Better UX, lower bounce rate

Studies consistently show that a 1-second delay in page load time increases bounce rate by up to 32%. Visitors who land on a fast page stay longer, view more content, and convert at higher rates. Image optimization is the single highest-leverage change most websites can make to improve both user experience and business outcomes.

FAQ

Frequently asked questions

What is WebP and why should I use it?

WebP is an image format developed by Google. It produces files roughly 25–35% smaller than JPEG and 50% smaller than PNG at the same visual quality. All modern browsers — Chrome, Firefox, Safari, Edge — support WebP, making it the safest next-gen format to adopt today. Switching to WebP is one of the fastest wins you can get from Google PageSpeed Insights.

What is AVIF and how does it compare to WebP?

AVIF (AV1 Image File Format) is the newest generation of web image formats, offering 50–80% smaller files than JPEG. It handles gradients, photographic content, and transparency exceptionally well. Browser support is now excellent across Chrome, Firefox, and Safari. AVIF is ideal when file size is the top priority, such as for e-commerce product images or hero photos.

How does image optimization affect my website's SEO?

Page speed is a confirmed Google ranking factor. Google's Core Web Vitals — especially Largest Contentful Paint (LCP) — are directly tied to how fast your images load. Large, unoptimized images are the single biggest cause of slow LCP scores. Converting images to WebP or AVIF and reducing file sizes by 50–80% can dramatically improve your Core Web Vitals, which in turn boosts your search rankings and user experience.

Are my uploaded images stored on your servers?

No. All image processing happens in memory on the server and is immediately discarded after your download is complete. We never write your files to disk, never store them in a database, and never share them with third parties. Your images are private.

Is there a file size or number limit?

There are no artificial limits. You can upload as many files as you want in one session and process them all at once. Practical limits depend only on your browser and network speed.

Do converted images lose quality?

Only if you choose to reduce quality. By default, the converter uses a high-quality setting that is visually indistinguishable from the original while still achieving significant size reduction. You can lower the quality slider further if you need even smaller files, for example for thumbnails or previews.