Free SEO tools

Find the problem. Fix it here.

The Scoped SEO extension shows you what is wrong on a page. These free tools fix it: convert images to WebP, validate schema, check robots.txt, preview snippets and more.

Image tools

Convert, compress and resize images. Files never leave your browser.

WebP Converter

Any image to WebP. Batch, quality slider, ZIP download.

Private, in your browser

PNG to WebP

PNG to WebP with transparency. Lossless or lossy, batch and ZIP.

Private, in your browser

JPG to WebP

JPG and JPEG photos to WebP. Pick quality, compare sizes, download a ZIP.

Private, in your browser

Image Compressor

Compress JPG, PNG and WebP. Live comparison, batch, ZIP.

Private, in your browser

Compress PNG

Lossless PNG optimizer. Same pixels, smaller file.

Private, in your browser

Compress JPEG

JPEG compression with MozJPEG. See the saving per photo.

Private, in your browser

Image Resizer

Resize by pixels or percent. Export WebP, JPG or PNG.

Private, in your browser

AVIF Converter

Convert to AVIF and compare with WebP.

Private, in your browser

Image Converter

Switch between PNG, JPG and WebP. SVG to PNG.

Private, in your browser

PNG to JPG

PNG to JPG with background color for transparency. Batch and ZIP.

Private, in your browser

JPG to PNG

JPG to PNG, lossless output. Batch and ZIP download.

Private, in your browser

SVG to PNG

SVG to PNG at 1x to 4x scale, transparent background.

Private, in your browser

WebP to PNG

WebP to PNG with transparency kept. Batch and ZIP download.

Private, in your browser

WebP to JPG

WebP to JPG with quality and background color. Batch and ZIP.

Private, in your browser

Compress WebP

Re-encode WebP at a lower quality. Never returns a bigger file.

Private, in your browser

Schema and structured data

Validate JSON-LD and generate markup for rich results.

Schema Markup Validator

Validate JSON-LD and Microdata: syntax, schema.org and Google.

Enter a web address

Schema Markup Generator

Create JSON-LD for 11 common types.

Private, in your browser

FAQ Schema Generator

Build FAQ JSON-LD from your questions and answers.

Private, in your browser

Article Schema Generator

Article and BlogPosting JSON-LD in a few fields.

Private, in your browser

Product Schema Generator

Product JSON-LD with price, stock and reviews.

Private, in your browser

Local Business Schema Generator

LocalBusiness JSON-LD with address and opening hours.

Private, in your browser

Organization Schema Generator

Organization JSON-LD with logo and social profiles.

Private, in your browser

Breadcrumb Schema Generator

BreadcrumbList JSON-LD from your page trail.

Private, in your browser

HowTo Schema Generator

HowTo JSON-LD from your steps.

Private, in your browser

Content and on-page

Check titles, descriptions, headings, readability and alt text.

Alt Text Checker

Audit alt text on any page, or check a single line of alt text.

Enter a web address

SERP Snippet Preview

Preview Google results with pixel width and length checks.

Private, in your browser

Title Tag Checker

Check title length in characters and pixels.

Private, in your browser

Meta Description Length Checker

Check meta description length for desktop and mobile.

Private, in your browser

Meta Title Optimizer

Optimize a meta title and copy the result.

Private, in your browser

Meta Description Optimizer

Optimize a meta description and copy the result.

Private, in your browser

Word Counter

Words, characters, readability and keyword density.

Private, in your browser

Character Counter

Count characters with and without spaces.

Private, in your browser

Sentence Counter

Count sentences and see the average length.

Private, in your browser

Reading Time Calculator

Estimate reading and speaking time for any text.

Private, in your browser

Readability Checker

Flesch score and grade level for your text.

Private, in your browser

Keyword Density Checker

See how often a keyword appears, and the top words.

Private, in your browser

Heading Checker

H1 to H6 outline with problems highlighted.

Enter a web address

Indexing and crawling

Find out why a page is or is not crawled and indexed.

Indexability Checker

Noindex, canonical, status and robots.txt in one check.

Enter a web address

Canonical Tag Checker

Check the canonical tag, redirects and indexability.

Enter a web address

robots.txt Tester

Validate robots.txt and test URLs per crawler.

Enter a web address

Sitemap Validator

Validate sitemap.xml structure, limits and URLs.

Enter a web address

Redirect Checker

Follow redirect chains and read response headers.

Enter a web address

HTTP Header Checker

Read HTTP response headers and security headers.

Enter a web address

AI search

See which AI crawlers can read your site and publish an llms.txt.

llms.txt Generator

Build an llms.txt in the standard format.

Private, in your browser

AI Crawler Checker

Which AI crawlers can read a site, and is there an llms.txt.

Enter a web address

Technology

Find the platform and technologies behind any website.

Website Technology Checker

CMS, framework, hosting, CDN and analytics behind any site.

Enter a web address

What CMS Is This Site Using?

Find the CMS behind any website.

Enter a web address

Why these tools

Practical tools, no strings

Your files stay yours

Image, text and code tools run entirely in your browser. Nothing is uploaded, so there is nothing to store or leak.

Built from real audit checks

Every tool matches a check in the Scoped SEO extension, so the advice here uses the same rules you see in the audit.

Free, no account

No sign-up, no watermarks, no daily file limits on browser tools. URL tools have a fair hourly limit to keep them fast for everyone.

Found it in the extension?

Fix it from the tab that flagged it

Each audit tab links to the tool that fixes what it finds.

Extension tab	What it flags	Fix it with
Images	Not WebP, oversized, heavy files, missing alt text	WebP Converter Image Compressor Image Resizer AVIF Converter Alt Text Checker
Schema	Invalid JSON-LD, missing properties, no rich results	Schema Markup Validator Schema Markup Generator
Tech Stack	What a site is built with	Website Technology Checker
Content	Title and description length, headings, readability	Meta Title Optimizer Meta Description Optimizer SERP Snippet Preview Heading Checker
Social	Missing Open Graph or Twitter Card tags	Open Graph Checker Meta Tag Generator
Indexability	Noindex, canonical, robots.txt, sitemap	Indexability Checker robots.txt Tester Sitemap Validator Redirect Checker
Speed	Heavy images, slow first byte	Image Compressor Redirect Checker WebP Converter
AI Search Readiness	Blocked AI crawlers, no llms.txt	AI Crawler Checker llms.txt Generator

Audit first, then fix

Install Scoped SEO to see every issue on any page in one click, with a Fix it link beside each one.