Also searched as: image converter online free · png to webp · jpg compressor · convert image format · optimize images for web · compress png · heic to jpg

Image SEO starts before the alt text

If the file is 4MB, no amount of poetic alt text saves your mobile users. Image Lab is the free convert/optimize step: change formats, shrink weight, prepare assets for real sites.

Popular searches: png to webp converter, compress jpg online, convert heic to jpg, optimize images for website, free image converter, reduce image size for wordpress. Dump the files above and pick an output browsers like.

WebP (or other modern formats your stack supports) usually beats giant PNGs for photos. Keep PNG when you need sharp UI transparency. JPEG still works fine for many CMS workflows that lag on newer formats.

Batch product photos when you can, but spot-check a couple of outputs at 100% zoom. Over-compression shows first on text overlays and thin lines.

After you convert — the checklist people skip

Name files like blue-running-shoes.webp not IMG_4032.webp. Descriptive names help humans and sometimes image search context.

Add descriptive alt on the site (what is in the image, not keyword soup). Set width/height or CSS aspect-ratio to limit layout shift. Lazy-load below-the-fold images. Do not lazy-load your LCP hero.

Then run the Image SEO Auditor in the SEO toolkit on a live URL to catch missing alts the CMS forgot. Tools catch patterns; you still fix the theme.

Retina: shipping 2x assets is fine if weight stays sane. A 4000px wide JPEG for a 400px slot is not "future proof", it is just heavy.

Format cheat sheet (practical, not academic)

Photos → WebP or well-compressed JPEG. Logos/UI with transparency → PNG or SVG (SVG has its own optimizer in the SEO/dev tools). Screenshots with text → careful compression so type stays readable.

HEIC from iPhones often needs a convert before older Windows or CMS uploads accept it. That alone is why a lot of people land here.

Animated GIFs can be enormous. Prefer short muted video or modern animated formats when your stack allows — but that is a separate workflow from still-image convert.

Mistakes that keep pages slow

Uploading camera originals straight from a phone dump. Always resize to the largest size you actually display.

Running images through three different "compressors" until artifacts look like modern art.

Forgetting dark-mode or transparent logos on colored heroes — that is design, not conversion, but it still kills trust.

Skipping CDN/cache after you fix weights. Hosting still matters; ClouHost plans exist when you are done DIY-ing assets.

Ecommerce and blog image habits that work

Product grids: consistent aspect ratios, similar compression, descriptive alts. Blog posts: one solid hero under a few hundred KB when possible, not a 5MB DSLR dump.

Open Graph images are a separate crop — square-ish or 1.91:1 depending on network. Convert a dedicated share image instead of reusing a stretched banner.

When in doubt, open the live page on mobile data and scroll. Your eyes will catch the lag before any audit tool does.

Part of ClouHost — free tools next to real hosting

ClouHost is a hosting company that also ships free design, free development, and free growth tools. Media labs sit next to the SEO suite and AI detector on purpose: fix files, fix pages, then host the site that needs to rank.

You do not need a paid plan to convert files here. When you are ready for WordPress, WooCommerce, or a custom site, plans show INR and USD pricing with a 30-day money-back window and free migration options.

Related free tools people jump to after converting: page speed checks, image SEO auditor, meta tag studio, and the AI content detector for blog drafts that accompany media.