104 guides 14 free tools updated 21 August 2026

Find image waste.
Fix it. Keep it fixed.

Audit the page in front of you, fix a file or a whole folder, then stop the same waste returning in production. Local tools stay local; hosted processing is clearly labelled.

Audit this page Fix 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, progressive, mozjpeg · WebP q80, effort 6 · AVIF q58. Source, hashes and raw data →

Audit → Fix → Automate

01 Audit a page Find oversized files, wasted pixels, legacy formats, loading mistakes, and missing markup. 02 Fix one file Compress, inspect, or convert 6 verified input formats to 5 outputs. 03 Fix a whole folder Use Press to audit and batch-convert folders locally without touching the originals. 04 Automate delivery Let Sirv resize, optimize, and serve the right image automatically in production.

Latest

All guides
Use Case 10 min read AI Alt Text: How Alt Text Generators Work and When to Use Them An 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. Performance 12 min read Automatic Social Share Images: Build an OG Image Generator for Every Page Generate 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. Performance 10 min read Bootstrap Images: Every Class You Need, Plus What Bootstrap Won't Do for You A 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

Formats WebP, AVIF, JPEG, PNG, GIF, SVG, HEIC Platforms Shopify and WordPress workflows Social media Sizes, crops and compression per network Industries Real estate, restaurants, fashion, and more

In depth

All 104 guides
Format 13 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.
Format 16 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.
Format 14 min read
9 Ways to Convert Images to WebP in Bulk

Convert PNG and JPG to WebP with Press, cwebp, sharp, ImageMagick, libvips and CDNs. Which quality setting matches your JPEG, when lossless wins, and how to serve WebP without breaking anything.
Comparison 17 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.
Format 14 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.
Comparison 15 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.