104 guides14 free toolsupdated 21 August 2026

Same picture.
52% fewer bytes.

Practical guides and free tools for making web images smaller without making them worse. No sign-up, no upload.

Read the guidesCompress an image
Miniature print-shop crew compressing a tall stack of identical photographs into one thin, equally crisp image

That image, encoded three ways at matched visual quality

JPEG
50 KB
WebP
37 KB
AVIF
24 KB

JPEG q82, mozjpeg · WebP q80 · AVIF q58. Measured during this page's build, not typed in by hand.

Start here

Convert a fileHEIC, WebP, PDF and 30+ other pairs. Runs in your browser.Inspect an imageSee what a file actually weighs, and what it should weigh.Find a sizeExact pixel dimensions for social, ecommerce and Open Graph.

Latest

All guides
Use Case10 min readAI Alt Text: How Alt Text Generators Work and When to Use ThemAn AI alt text generator writes image descriptions in seconds. Learn how auto alt text works, where it fails, and how to combine generation with human editing.Performance12 min readAutomatic Social Share Images: Build an OG Image Generator for Every PageGenerate a dynamic og image for every page automatically. Compare static, build-time, and on-demand OG image generators with @vercel/og, astro-og-canvas, Puppeteer, and sharp.Performance10 min readBootstrap Images: Every Class You Need, Plus What Bootstrap Won't Do for YouA practical guide to bootstrap images: img-fluid, img-thumbnail, alignment classes, figures, cards, carousels, lazy loading, and responsive srcset patterns that Bootstrap 5 does not handle for you.

Browse by topic

FormatsWebP, AVIF, JPEG, PNG, GIF, SVG, HEICPlatformsShopify and WordPress workflowsSocial mediaSizes, crops and compression per networkIndustriesReal estate, restaurants, fashion, and more
Audit any page's images from your browserA Chrome extension that reports the format, real weight and wasted pixels of every image on the page, and what you would save with WebP or AVIF. Open source, nothing leaves your browser.Get the extension Give your AI assistant these image skillsEight skills for optimization, video, galleries, 360 spins, Sirv APIs and ecommerce workflows. Works with Claude Code, Cursor and Codex. Free.Get the skills

In depth

All 104 guides
Format13 min read
10 Ways to Convert Any Image to JPG on Any Device

Turn any image into a JPG - Windows, macOS, iPhone, Android, Linux, browser and command line. Plus how to find out what your file really is when the extension is lying.

Format16 min read
8 Ways to Convert an Image to Vector (JPG and PNG to SVG)

How to turn a JPG or PNG into a vector - Inkscape, Illustrator Image Trace, potrace, VTracer, AI vectorizers and manual redraw - what each one is good at, and the cases where tracing is the wrong answer.

Format14 min read
8 Ways to Convert Images to WebP in Bulk

Convert PNG and JPG to WebP with cwebp, sharp, ImageMagick, libvips and CDNs. Which quality setting matches your JPEG, when lossless wins, and how to serve WebP without breaking anything.

Comparison17 min read
9 Ways to Extract Text From an Image (OCR Methods Compared)

Convert a photo to text with the method that fits the job - phone camera, Google Drive, Windows and macOS built-ins, Tesseract, cloud OCR APIs, and Acrobat - plus how to raise accuracy on bad scans.

Format14 min read
8 Ways to Convert HEIC to JPG (iPhone, Mac, Windows and Batch)

Convert iPhone HEIC photos to JPG - Shortcuts, Finder Quick Actions, sips, ImageMagick, libheif and Windows. Plus the setting that stops your phone making HEICs at all.

Comparison15 min read
12 Image Converters Compared: Browser, Desktop, CLI and API

Which image converter to use - browser tools, XnConvert, IrfanView, ImageMagick, libvips, sharp, Pillow and CDNs. Compared on batch size, formats, speed, privacy and cost.