62+ Free SEO, AI & Marketing
Tools in One Place
Powerful online tools for SEO analysis, AI content writing, image editing, PDF management, and more. No registration required. 100% free.
Browse 12 Tool Categories
Find the perfect tool for your task. From SEO analysis to AI content creation, we have it all.
Text Analysis Tools
Analyze, count, convert, and manipulate text with our free online text tools.
7 tools →Online Calculators
Free online calculators for age, BMI, loans, percentages, discounts and more.
7 tools →Binary Converter Tools
Convert between binary, decimal, hexadecimal, octal and text instantly.
8 tools →Meta Tags Tools
Generate and analyze meta tags, Open Graph, and Twitter Cards for SEO.
4 tools →Keywords Tools
Research keywords, check density, extract keywords, and analyze competition.
4 tools →BackLink Tools
Check backlinks, find broken links, and analyze link profiles.
3 tools →Domain Tools
WHOIS lookup, domain age checker, DNS records, IP lookup and more.
5 tools →Website Tracking Tools
Check HTTP headers, redirects, server status, and SSL certificates.
4 tools →Website Management Tools
Generate robots.txt, XML sitemaps, .htaccess files and more.
4 tools →Image Editing Tools
Compress, resize, convert images, generate QR codes and more.
6 tools →Online PDF Tools
Merge, convert, and analyze PDF files online for free.
5 tools →AI Writing Tools
AI-powered article writer, rewriter, summarizer, and content generators.
5 tools →Most Popular Tools
Discover our most-used tools trusted by millions of users worldwide.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time ins...
Character Counter
Count characters with and without spaces, words, lines, and get text statistics.
Case Converter
Convert text to uppercase, lowercase, title case, sentence case, and more.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text for your designs and mockups.
Text Reverser
Reverse your text, words, or sentences. Flip text backwards instantly.
Remove Duplicate Lines
Remove duplicate lines from your text. Keep unique lines only.
Text to Speech
Convert text to speech with natural-sounding voices. Listen to any text.
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes.
Percentage Calculator
Calculate percentages, percentage increase/decrease, and more.
BMI Calculator
Calculate your Body Mass Index (BMI) and check your health category.
Loan EMI Calculator
Calculate monthly EMI, total interest, and total payment for any loan.
Discount Calculator
Calculate the final price after applying a discount percentage.
GST Calculator
Calculate GST amount, net price, and gross price with different GST rates.
Salary Calculator
Convert salary between hourly, daily, weekly, monthly, and yearly.
Binary to Decimal
Convert binary numbers to decimal format instantly.
Decimal to Binary
Convert decimal numbers to binary format instantly.
Binary to Hexadecimal
Convert binary numbers to hexadecimal format.
Hexadecimal to Binary
Convert hexadecimal numbers to binary format.
Binary to Octal
Convert binary numbers to octal (base-8) format.
Octal to Binary
Convert octal (base-8) numbers to binary format.
Text to Binary
Convert text to binary code. See the binary representation of any text.
Binary to Text
Convert binary code back to readable text.
Meta Tag Generator
Generate complete HTML meta tags for SEO, social sharing, and more.
Open Graph Generator
Generate Open Graph meta tags for Facebook, LinkedIn sharing.
Twitter Card Generator
Generate Twitter Card meta tags for beautiful tweet previews.
Meta Tag Analyzer
Analyze the meta tags of any webpage and get SEO recommendations.
Keyword Density Checker
Check keyword density and frequency in your content for SEO.
Keyword Counter
Count how many times each keyword appears in your text.
Keyword Extractor
Extract important keywords and phrases from any text automatically.
Keyword CPC Estimator
Estimate the Cost Per Click (CPC) value for any keyword.
Backlink Checker
Check backlinks pointing to any domain or URL.
Broken Link Checker
Find broken links on any webpage that return 404 errors.
Link Analyzer
Analyze all internal and external links on any webpage.
WHOIS Lookup
Look up domain registration details with WHOIS search.
Domain Age Checker
Check how old a domain is and when it was first registered.
DNS Lookup
Look up DNS records (A, AAAA, MX, TXT, CNAME, NS) for any domain.
IP Lookup
Look up IP address location, ISP, and geolocation details.
Domain to IP
Find the IP address of any domain name.
HTTP Header Checker
Check HTTP response headers of any URL.
Redirect Checker
Trace all URL redirects and see the complete redirect chain.
Server Status Checker
Check if a website is up or down and its HTTP status code.
SSL Checker
Check SSL certificate details, validity, and expiration.
Robots.txt Generator
Generate a robots.txt file for your website with ease.
XML Sitemap Generator
Generate an XML sitemap for your website for better SEO.
.htaccess Generator
Generate .htaccess rules for redirects, security, and more.
Page Source Viewer
View the HTML source code of any webpage.
Image Compressor
Compress and optimize images without losing quality.
Image Resizer
Resize images to any dimension while maintaining aspect ratio.
Image Format Converter
Convert images between JPEG, PNG, WebP, GIF, and BMP formats.
Image to Base64
Convert any image to a Base64 encoded string.
Base64 to Image
Convert a Base64 string back to a downloadable image.
QR Code Generator
Generate QR codes for URLs, text, WiFi, contacts, and more.
Merge PDF
Merge multiple PDF files into a single PDF document.
PDF to Image
Convert PDF pages to high-quality images (PNG/JPEG).
Image to PDF
Convert images to a PDF document. Combine multiple images.
PDF Page Counter
Count the number of pages in a PDF file instantly.
PDF Metadata Viewer
View and extract metadata from any PDF file.
AI Article Writer AI
Generate complete articles on any topic using AI.
AI Rewriter AI
Rewrite and paraphrase any text using AI while keeping the meaning.
AI Summarizer AI
Summarize long texts into concise summaries using AI.
AI Title Generator AI
Generate catchy, SEO-friendly titles and headlines using AI.
AI Meta Description Generator AI
Generate SEO-optimized meta descriptions for your pages using AI.
Featured AI Writing Tools
Leverage the power of artificial intelligence to create, rewrite, and optimize content in seconds.
AI Article Writer
Generate complete articles on any topic using AI.
AI Rewriter
Rewrite and paraphrase any text using AI while keeping the meaning.
AI Summarizer
Summarize long texts into concise summaries using AI.
AI Title Generator
Generate catchy, SEO-friendly titles and headlines using AI.
AI Meta Description Generator
Generate SEO-optimized meta descriptions for your pages using AI.
Trusted by Millions Worldwide
See what our users say about ZestTools.
"ZestTools has completely transformed my workflow. The AI writing tools save me hours every day. The word counter and case converter are my go-to tools!"
"Best collection of SEO tools I've found online. The keyword density checker and meta tag generator are incredibly accurate and easy to use."
"The developer tools section is fantastic. JSON formatter, CSS minifier, Base64 encoder — all in one place. Clean interface and fast results."
"I use ZestTools every single day for my marketing campaigns. The UTM builder and calculators are simple yet powerful. Highly recommended!"
"As a student, I love that everything is free. The word counter, text to speech, and binary converters have been incredibly helpful for my coursework."
"Clean design, fast tools, no annoying popups. ZestTools respects my time. The PDF tools and image compressor are always reliable."
Frequently Asked Questions
Got questions? We have answers.
Are all ZestTools free to use?
Yes! All our tools are 100% free to use with no registration required. We offer unlimited usage for most tools. Some AI-powered tools may have daily usage limits on the free tier.
Do I need to create an account?
No account is required to use any tool. Simply visit the tool page, enter your input, and get instant results. We do offer optional accounts for saving results and accessing premium features.
Is my data safe?
Absolutely. Most of our tools process data directly in your browser — your text and files never leave your device. For server-side tools (like domain lookups), we never store or share your data.
How many tools does ZestTools offer?
ZestTools currently offers 62+ free online tools across 12 categories including SEO, AI writing, text analysis, image editing, PDF tools, calculators, and more. We add new tools regularly.
Can I use ZestTools on my phone?
Yes! ZestTools is fully responsive and works perfectly on smartphones, tablets, and desktop computers. We also plan to launch a dedicated mobile app soon.
Do you have an API?
Yes, we provide a JSON API for developers who want to integrate our tools into their own applications. Visit our API documentation page for details.
How do the AI writing tools work?
Our AI writing tools are powered by advanced language models (GPT, Gemini) that generate, rewrite, and summarize content based on your inputs. The AI produces unique, high-quality content every time.
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