Free Online Tools — All in One Place

These tools cover the on-page and technical side of search engine optimisation. You will find generators for meta titles, meta descriptions, robots.txt files, and schema markup, alongside tools that show you how your pages appear in Google search results before you publish them. Suraj built many of these around the specific checks he runs for his own clients, so they reflect real SEO workflows. The more data-intensive SEO tools, such as backlink checkers and rank trackers, are in development and will be available on a free plan with generous usage limits when they launch.

This category covers the technical side of managing a website. You can check how a page responds to HTTP requests, inspect server headers, test redirect chains, look up DNS records, and use other utilities that developers and SEO professionals reach for when diagnosing site issues. Most of these run in the browser. The tools that make live requests to external servers are among those that will have a generous free usage limit.

With 50 live tools, this is one of the most-used categories on Visiblytics. You can convert between JPG, PNG, WebP, AVIF, BMP, TIFF, and other formats, resize images to exact dimensions, compress files to a specific size without visible quality loss, crop, rotate, flip, blur, sharpen, adjust brightness and contrast, remove noise, add watermarks, generate favicons, create thumbnails, and more. All processing happens in your browser, so your images never leave your device.

Designers, developers, and marketers use these tools to pick colours, convert between formats, and generate code. You can extract a colour from any uploaded image, convert between HEX, RGB, HSL, and CMYK, generate CSS gradient code, and build colour palettes. Whether you are matching a brand colour from a logo or picking a shade for a background, these tools return the exact values you need.

This is the largest category on the site. It covers everything from counting words and characters to converting text case, removing duplicate lines, sorting alphabetically, generating Lorem Ipsum, finding and replacing text, extracting emails or URLs from blocks of content, and dozens of other text manipulation tasks. Writers, editors, social media managers, virtual assistants, and developers all tend to have a few of these bookmarked for daily use.

Simple tools that do exactly what they say. Random numbers, random dates, random passwords, random IP addresses, random names, and more. Developers and QA testers use these regularly for generating test data. The password generator is particularly useful for creating credentials that are actually secure rather than memorable but predictable.

These tools generate Unicode text styles that work across social media platforms and most websites. You can create bold, italic, small caps, strikethrough, cursive, and dozens of other decorative text styles that are not available on a standard keyboard. The output copies and pastes anywhere, including Instagram, Twitter, LinkedIn, and WhatsApp, with no special software needed.

Built for students and academics who need quick, accurate results. The citation generators support APA, MLA, and Chicago formats, covering books, websites, journal articles, and more. The GPA and grade calculators handle weighted and unweighted grading systems. If you are putting together a bibliography or working out what you need on your final exam, these tools do the calculation for you.

Content creators and social media managers use these tools to stay within platform character limits, generate the right Open Graph and meta tags for link sharing, and make sure posts look correct everywhere they appear. The character counters cover Twitter, LinkedIn, Instagram, and Facebook. The meta tag generators help you control exactly how your links are previewed when someone shares them. Small details, but they matter when you are managing multiple platforms at once.

This category handles the file conversions that come up constantly in real work: turning a PDF into images, converting images into a single PDF, compressing a PDF before emailing it, merging multiple PDFs into one, and converting between data formats like CSV, JSON, and XML. All conversions happen in your browser. Your files do not leave your device and are not stored anywhere after the session ends.

With 70 live tools, this is the most complete developer category on the site. You can format and validate JSON, XML, YAML, TOML, SQL, GraphQL, HTML, CSS, JavaScript, PHP, SCSS, and TypeScript. You can encode and decode Base64, URL, HTML entities, UTF-8, ROT13, and Caesar cipher. You can generate MD5, SHA256, and SHA512 hashes, decode JWT tokens, test regular expressions, build CSS layouts visually, work with Tailwind and Bootstrap, minify or obfuscate code, compare file differences, and convert between data formats. These tools are built for speed: paste your input, get your output, move on.

The business tools cover practical day-to-day needs for freelancers, small businesses, and teams. You can generate professional invoices and download them as PDFs, create QR codes and barcodes, build HTML email signatures, and use other utilities that come up regularly when running or supporting a business. These tools were built because they filled gaps in Suraj's own freelance workflow and are likely useful for people visiting the site for similar reasons.

With over 80 calculators in this category, it covers personal finance, business finance, and investment calculations. ROI, break-even points, loan repayments, compound interest, profit margins, AdSense revenue estimates, and more. These tools are built for people who need a quick, accurate number rather than a full financial model. Every calculator is free, runs instantly, and does not require you to share any financial data.

This is the largest calculator category on the site. It covers everyday maths alongside more specific calculations and conversions. Percentage calculators, age calculators, date difference calculators, time zone converters, unit converters, and more. If you need to quickly work something out without setting up a spreadsheet, this is the place to look.

These tools help with common health and fitness calculations: BMI, daily calorie needs, body fat percentage, ideal weight, and more. They are informational tools designed to give you useful reference numbers based on established formulas. No health data is stored, shared, or transmitted anywhere. These are not a substitute for medical advice, but they are a fast way to get a baseline number.