Free SEO and writing tools to write better, rank higher and fix your site
Paraphrase and proofread text, research keywords, audit pages and convert PDF and image files. Every tool is free and works on any device.
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12 categories · 120 toolsNo tools match that. Try a shorter word, like “pdf” or “grammar”.
Paraphrasing & rewriting
9Reword sentences, paragraphs and whole articles while keeping the meaning.
Paraphrase Tool› Article Rewriter› Essay Rewriter›Grammar & proofreading
6Check grammar, spelling, punctuation and readability in English and German.
Grammar Checker› Punctuation Checker› Spelling Checker›Word counters & text
14Count words and characters, compare two texts, change case and turn text into speech.
Word Counter› Comma Separator› Text Compare›Keyword research
6Find keyword ideas and long-tail phrases, check keyword density and see where a page ranks.
Keywords Suggestion Tool› Long Tail Keyword Generator› Keyword Density Checker›Meta tags & markup
9Write meta tags, Open Graph tags and schema markup, and create sitemaps and robots.txt files.
Meta Tag Generator› Schema Markup Generator› XML Sitemap Generator›Website audit & speed
13Test page speed and mobile-friendliness, find broken links and see how search engines read a page.
AI Search Visibility Checker› Page Speed Checker› Mobile Friendly Test›Backlinks & authority
9Check backlinks, domain authority and page authority, and build a disavow file.
Backlink Checker› Domain Authority Checker› Page Authority Checker›Domain & IP
9Look up WHOIS records, domain age, hosting and IP details, and check if a domain is free.
Whois Checker› Domain Age Checker› Reverse IP Domain Checker›PDF tools
17Merge, split, rotate and watermark PDFs, and convert them to and from JPG, PNG, text and HTML.
Merge PDF› PDF to JPG› JPG to PDF›Image tools
10Compress and crop images, pull text out of pictures and make QR codes.
Image Optimizer› Image Crop Tool› Picture to Text›Show all 10 tools
QR Code Generator› Image to Base64› Base64 to Image› PNG to TXT› BMP to TXT› TIFF to TXT› WebP to GIF›Developer tools
7Minify CSS, JavaScript and HTML, encode or decode HTML and generate MD5 hashes.
HTML Editor› CSS Minifier› JS Minifier›Converters & calculators
11Convert binary, hex, decimal and Roman numerals, and work out ages, averages and AdSense earnings.
Age Calculator› Binary Translator› Hex to Decimal›Popular tools
Free, with no account
Open a tool and use it. No sign-up, no trial, no watermark on your files.
The right tool in one search
120 tools in 12 clear groups, from paraphrasing to PDF conversion.
One click to the next step
Paraphrased something? Send it straight to the Grammar Checker. Your text comes with you.
Free tools for writers, marketers and site owners
SEO Tools Centre is a free collection of 120 online tools in 12 groups. They cover three kinds of work:
- Writing. Paraphrase text, check grammar and spelling, score readability and count words in essays, articles and web copy.
- Search engine optimization (SEO). Research keywords, write meta tags and schema markup, build XML sitemaps and check backlinks and domain authority.
- Running a website. Test page speed and mobile-friendliness, find broken links, look up WHOIS and hosting details, and convert PDF and image files.
Each tool page explains what the tool does and how to use it, step by step. When you finish, the next useful tool is one click away.
Common questions
Are the tools really free?
Yes. All 120 tools on SEO Tools Centre are free to use, with no trial and no watermark on your files.
Do I need to sign up?
No. Open any tool and start. There is no account to create.
What happens to the files I upload?
Files you upload or convert, such as PDFs, images and audio, are deleted from our server automatically within 24 hours.
Do the tools work on phones?
Yes. Every page works on phones, tablets and desktops.
How do I find the right tool?
Type what you want to do in the search box at the top of the page, or browse the 12 categories.
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