All Free Online Tools – The Complete BigToolSite List
This page lists every tool on BigToolSite, grouped by category. The library covers images, PDFs, text and writing, SEO, code, CSS and color, calculators and network utilities. Each tool is free, runs without an account, and opens straight into a working interface. Use the category filters to narrow the list, or your browser’s find function to jump to a specific tool by name.
- Ad Revenue Calculator
- Age Calculator
- Aspect Ratio Calculator
- BMI Calculator
- Broadcast Address Calculator
- CIDR Calculator
- Conversion Rate Calculator
- CPM Calculator
- CTR Calculator
- DPI/PPI Calculator
- Freelance Hourly Rate Calculator
- Golden Ratio Calculator
- IP Subnet Calculator
- IPv4 Calculator
- IPv6 Calculator
- Line Height Calculator
- Network Mask Calculator
- Percentage Calculator
- Pixel Calculator
- Pixel to EM Converter
- Random Number Generator
- Roman Numeral Converter
- SEO ROI Calculator
- Storage & Bandwidth Calculator
- Syllable Counter
- AVIF Image Converter
- Base64 Encoder / Decoder
- BMP Image Converter
- Braille Translator
- Case Converter
- Color Converter
- CSV to JSON
- File Size Calculator
- GIF Image Converter
- HEIC Image Converter
- Hex to Decimal Converter
- Hex to Text & Text to Hex Converter
- htaccess to Nginx Converter
- HTML Entity Encoder/Decoder
- HTML to BBCode Converter
- ICO Image Converter
- Image Background Removal
- Image Base64 Converter
- Image Color Picker
- Image Compressor
- Image Cropper
- Image Metadata/EXIF Viewer
- Image Resizer
- Image to PDF Converter
- Image to Text (OCR)
- Image Watermark Removal Tool
- Image Watermark Tool
- INI to JSON Converter
- JPEG Image Converter
- JPG to Image Converter
- JSON to CSV
- Leetspeak Translator
- Markdown to BBCode Converter
- Markdown to HTML Converter
- Nginx to .htaccess Converter
- PDF Converter
- PDF to Image Converter
- Pig Latin Translator
- PNG Image Converter
- Reverse Text Generator
- RGB to CMYK Converter
- Text to Binary Converter
- Text to Octal Converter
- Text to Slug Converter
- TIFF Image Converter
- Timestamp Converter
- TOML to JSON Converter
- Upside Down Text Generator
- URL Encoder/Decoder
- WebP Image Converter
- Wingdings Translator
- XML to JSON Converter
- YAML to JSON Converter
- .htaccess Redirect Generator
- .htpasswd Generator
- Color Blindness Simulator
- Cron Expression Generator
- CSS Beautifier
- CSS Border Radius Generator
- CSS Box Shadow Generator
- CSS Clamp Calculator
- CSS Gradient Generator
- CSS Minifier
- CSS Text Shadow Generator
- CSS Triangle Generator
- Curl Command Generator
- Grid Layout Calculator
- Hash Generator
- HTML Beautifier
- HTML Minifier
- HTML Table Generator
- JS Beautifier
- JS Minifier
- JSON Formatter & Validator
- JWT Encoder / Decoder
- Lorem Ipsum Generator
- Multiple URL Opener
- Open Graph Generator
- Open Graph Preview Checker
- Password Generator
- Redirect Chain Checker
- Regex Cheat Sheet & Tester
- Regex Extractor
- Regex Generator
- Regex Replace
- Regex Validator
- Remove Duplicate Lines
- Robots.txt Generator
- Robots.txt Tester and Validator
- Schema Markup Generator
- Screen Resolution Simulator
- Sitemap Generator
- SQL Formatter
- SQL Minifier
- SSL Checker
- Text Diff Checker
- URL List Comparator
- UTM Builder
- UTM Query Parameter Cleaner
- UUID/GUID Generator
- Word/Character Counter
- XML Formatter & Validator
How This List Is Organized
Each tool appears once, under the category that matches how people usually look for it. A few tools fit more than one group, so the filters above will surface them under every category they belong to. The Redirect Chain Checker, for example, is filed under SEO but also appears when you filter for network tools.
New tools are added most weeks and appear on this list as soon as they go live, so this page always reflects the full library rather than a curated selection.
Finding the Right Tool
If you know roughly what you need but not the tool name, start with the category filter. Image conversion, compression, resizing and cropping all sit under Image Tools, while anything involving code formatting, encoding, hashing or regex sits under Developer Tools.
If you are new to the site, the homepage shows a smaller selection with a short description of what each category covers.
Frequently Asked Questions
BigToolSite covers eight categories of free online tools: image, PDF, text and writing, SEO, developer and code, CSS and color, calculators and converters, and network and domain tools. This page lists all of them, and new tools are added to it automatically as they go live.
Yes. Every tool on BigToolSite is free with no account, no usage limit, no watermark and no premium tier. Nothing on this list is locked or restricted.
Each tool is listed once under its main category to keep the list readable, but the category filters recognize secondary categories too. A tool like the Redirect Chain Checker appears under both SEO and network filters even though it is listed under SEO.
Use the category filter to narrow the list, or press Ctrl+F on Windows or Command+F on Mac and type part of the tool name. Every tool on the site is on this page, so the search will find it if it exists.
Yes. All tools run in a modern mobile browser on Android and iOS with nothing to install, though large image and PDF jobs finish faster on a desktop with more memory available.
