--- title: "Web ToolBox | A Collection of Tools for Development" description: "80+ free web development tools with no sign-up required. Instantly format JSON, convert Base64, transform color codes, generate QR codes and more in your browser. Dramatically boost your development productivity." canonical_url: "https://web-toolbox.dev/en" meta: author: K "og:description": "80+ free web development tools with no sign-up required. Instantly format JSON, convert Base64, transform color codes, generate QR codes and more in your browser. Dramatically boost your development productivity." "og:image": "https://web-toolbox.dev/og/default-en.png" "og:image:alt": "Web ToolBox" "og:image:height": "630" "og:image:width": "1200" "og:title": "Web ToolBox | A Collection of Tools for Development" --- > Index of every page on this site: [llms.txt](https://web-toolbox.dev/llms.txt) 83 online tools ## Developer tools,all in one place - No sign-up - Completely free - Works instantly **2M+****uses** ![Screenshot](https://web-toolbox.dev/screenshots/light/s1.webp) ## Why Web ToolBox ### **80+ Developer Tools** Encoding, conversion, generation, and validation tools for everyday development work. ### **Desktop and Mobile** Open the same URL on any device. Nothing to install, and the tools work the same everywhere. ### **Privacy First** Many tools run directly in your browser, so your input can stay on your device. ## **Featured Tools** [

**Color Code Converter**

View a color code in multiple notations at once](https://web-toolbox.dev/en/tools/color-converter) [

**Dummy Image Generator**

Generate placeholder images in custom sizes](https://web-toolbox.dev/en/tools/dummy-image-generator) [

**Heading Extractor**

Extract and list heading tags from webpages](https://web-toolbox.dev/en/tools/heading-extractor) [

**Image Compare Slider**

Compare two images with a slider](https://web-toolbox.dev/en/tools/image-compare-slider) [

**JWT Decoder**

Decode and view JWT contents](https://web-toolbox.dev/en/tools/jwt-decoder) [

**OGP Checker**

Fetch and preview OGP information from URLs](https://web-toolbox.dev/en/tools/ogp-checker) [

**QR Code Reader**

Read QR codes from images or camera input](https://web-toolbox.dev/en/tools/qrcode-reader) [

**Subdomain Lookup**

List subdomains associated with a domain](https://web-toolbox.dev/en/tools/subdomain-lookup) [

**Text Diff Checker**

Enter two texts and see the diff highlighted in real time](https://web-toolbox.dev/en/tools/text-diff-checker) [

**ULID Generator**

Generate time-sortable ULIDs with timestamps](https://web-toolbox.dev/en/tools/ulid-generator) [

**Video Frame Extractor**

Extract selected video frames as images](https://web-toolbox.dev/en/tools/video-frame-extractor) [

**Word Counter**

Count words, characters, and lines](https://web-toolbox.dev/en/tools/word-counter) [

**XML Formatter**

Format or minify XML](https://web-toolbox.dev/en/tools/xml-formatter) [

**YouTube Thumbnail Downloader**

Get YouTube thumbnails in multiple sizes](https://web-toolbox.dev/en/tools/youtube-thumbnail-downloader) [

**Color Code Converter**

View a color code in multiple notations at once](https://web-toolbox.dev/en/tools/color-converter) [

**Dummy Image Generator**

Generate placeholder images in custom sizes](https://web-toolbox.dev/en/tools/dummy-image-generator) [

**Heading Extractor**

Extract and list heading tags from webpages](https://web-toolbox.dev/en/tools/heading-extractor) [

**Image Compare Slider**

Compare two images with a slider](https://web-toolbox.dev/en/tools/image-compare-slider) [

**JWT Decoder**

Decode and view JWT contents](https://web-toolbox.dev/en/tools/jwt-decoder) [

**OGP Checker**

Fetch and preview OGP information from URLs](https://web-toolbox.dev/en/tools/ogp-checker) [

**QR Code Reader**

Read QR codes from images or camera input](https://web-toolbox.dev/en/tools/qrcode-reader) [

**Subdomain Lookup**

List subdomains associated with a domain](https://web-toolbox.dev/en/tools/subdomain-lookup) [

**Text Diff Checker**

Enter two texts and see the diff highlighted in real time](https://web-toolbox.dev/en/tools/text-diff-checker) [

**ULID Generator**

Generate time-sortable ULIDs with timestamps](https://web-toolbox.dev/en/tools/ulid-generator) [

**Video Frame Extractor**

Extract selected video frames as images](https://web-toolbox.dev/en/tools/video-frame-extractor) [

**Word Counter**

Count words, characters, and lines](https://web-toolbox.dev/en/tools/word-counter) [

**XML Formatter**

Format or minify XML](https://web-toolbox.dev/en/tools/xml-formatter) [

**YouTube Thumbnail Downloader**

Get YouTube thumbnails in multiple sizes](https://web-toolbox.dev/en/tools/youtube-thumbnail-downloader) [

**Color Code Converter**

View a color code in multiple notations at once](https://web-toolbox.dev/en/tools/color-converter) [

**Dummy Image Generator**

Generate placeholder images in custom sizes](https://web-toolbox.dev/en/tools/dummy-image-generator) [

**Heading Extractor**

Extract and list heading tags from webpages](https://web-toolbox.dev/en/tools/heading-extractor) [

**Image Compare Slider**

Compare two images with a slider](https://web-toolbox.dev/en/tools/image-compare-slider) [

**JWT Decoder**

Decode and view JWT contents](https://web-toolbox.dev/en/tools/jwt-decoder) [

**OGP Checker**

Fetch and preview OGP information from URLs](https://web-toolbox.dev/en/tools/ogp-checker) [

**QR Code Reader**

Read QR codes from images or camera input](https://web-toolbox.dev/en/tools/qrcode-reader) [

**Subdomain Lookup**

List subdomains associated with a domain](https://web-toolbox.dev/en/tools/subdomain-lookup) [

**Text Diff Checker**

Enter two texts and see the diff highlighted in real time](https://web-toolbox.dev/en/tools/text-diff-checker) [

**ULID Generator**

Generate time-sortable ULIDs with timestamps](https://web-toolbox.dev/en/tools/ulid-generator) [

**Video Frame Extractor**

Extract selected video frames as images](https://web-toolbox.dev/en/tools/video-frame-extractor) [

**Word Counter**

Count words, characters, and lines](https://web-toolbox.dev/en/tools/word-counter) [

**XML Formatter**

Format or minify XML](https://web-toolbox.dev/en/tools/xml-formatter) [

**YouTube Thumbnail Downloader**

Get YouTube thumbnails in multiple sizes](https://web-toolbox.dev/en/tools/youtube-thumbnail-downloader) [

**Color Code Converter**

View a color code in multiple notations at once](https://web-toolbox.dev/en/tools/color-converter) [

**Dummy Image Generator**

Generate placeholder images in custom sizes](https://web-toolbox.dev/en/tools/dummy-image-generator) [

**Heading Extractor**

Extract and list heading tags from webpages](https://web-toolbox.dev/en/tools/heading-extractor) [

**Image Compare Slider**

Compare two images with a slider](https://web-toolbox.dev/en/tools/image-compare-slider) [

**JWT Decoder**

Decode and view JWT contents](https://web-toolbox.dev/en/tools/jwt-decoder) [

**OGP Checker**

Fetch and preview OGP information from URLs](https://web-toolbox.dev/en/tools/ogp-checker) [

**QR Code Reader**

Read QR codes from images or camera input](https://web-toolbox.dev/en/tools/qrcode-reader) [

**Subdomain Lookup**

List subdomains associated with a domain](https://web-toolbox.dev/en/tools/subdomain-lookup) [

**Text Diff Checker**

Enter two texts and see the diff highlighted in real time](https://web-toolbox.dev/en/tools/text-diff-checker) [

**ULID Generator**

Generate time-sortable ULIDs with timestamps](https://web-toolbox.dev/en/tools/ulid-generator) [

**Video Frame Extractor**

Extract selected video frames as images](https://web-toolbox.dev/en/tools/video-frame-extractor) [

**Word Counter**

Count words, characters, and lines](https://web-toolbox.dev/en/tools/word-counter) [

**XML Formatter**

Format or minify XML](https://web-toolbox.dev/en/tools/xml-formatter) [

**YouTube Thumbnail Downloader**

Get YouTube thumbnails in multiple sizes](https://web-toolbox.dev/en/tools/youtube-thumbnail-downloader) ## **All Tools** Collection of handcrafted tools ### **Text**12 - [

**Character Counter**

Count characters, lines, and UTF-8 byte size at once - Analyzer - Calculation](https://web-toolbox.dev/en/tools/character-counter) - [

**HTML Tag Remover**

Strip HTML tags and extract text - Formatter](https://web-toolbox.dev/en/tools/html-tag-remover) - [

**Line Break & Whitespace Remover**

Selectively remove line breaks, tabs, and spaces - Formatter](https://web-toolbox.dev/en/tools/line-break-remover) - [

**Lorem Ipsum Generator**

Placeholder text to fill mockups and drafts - Generator](https://web-toolbox.dev/en/tools/lorem-ipsum-generator) - [

**Text Case Converter**

Convert text to upper, lower, and other cases - Converter](https://web-toolbox.dev/en/tools/text-case-converter) - [

**Text Diff Checker**

Enter two texts and see the diff highlighted in real time - Comparison](https://web-toolbox.dev/en/tools/text-diff-checker) - [

**Text Duplicate Remover**

Remove duplicate lines and keep unique ones - Formatter](https://web-toolbox.dev/en/tools/text-duplicate-remover) - [

**Text Line Joiner**

Combine multiple lines with any delimiter into one line - Formatter](https://web-toolbox.dev/en/tools/text-line-joiner) - [

**Text Prefix Suffix Adder**

Batch add prefix and suffix to each line - Formatter](https://web-toolbox.dev/en/tools/text-prefix-suffix) - [

**Text Sorter**

Sort text lines by selected criteria - Formatter](https://web-toolbox.dev/en/tools/text-sorter) - [

**Text Splitter**

Split text by a delimiter into one item per line - Splitter](https://web-toolbox.dev/en/tools/text-splitter) - [

**Word Counter**

Count words, characters, and lines - Analyzer - Calculation](https://web-toolbox.dev/en/tools/word-counter) ### **Data Conversion**12 - [

**ASCII to HEX Converter**

Convert text to hex as UTF-8 bytes - Converter](https://web-toolbox.dev/en/tools/ascii-to-hex) - [

**Base64 Decode**

Decode Base64 strings into plain text - Decoder](https://web-toolbox.dev/en/tools/base64-decode) - [

**Base64 Encode**

Convert text to standard or URL-safe Base64 - Encoder](https://web-toolbox.dev/en/tools/base64-encode) - [

**CSV to JSON Converter**

Convert CSV data to JSON output - Converter](https://web-toolbox.dev/en/tools/csv-to-json) - [

**HEX to ASCII Converter**

Decode hex into UTF-8 text - Converter](https://web-toolbox.dev/en/tools/hex-to-ascii) - [

**JSON to CSV Converter**

Convert JSON data to CSV output - Converter](https://web-toolbox.dev/en/tools/json-to-csv) - [

**JSON to TOON Converter**

Convert JSON to TOON for LLM prompts - Converter](https://web-toolbox.dev/en/tools/json-to-toon) - [

**JSON to YAML Converter**

Convert JSON data to YAML output - Converter](https://web-toolbox.dev/en/tools/json-to-yaml) - [

**Number Base Converter**

Convert between binary, octal, decimal, and hex - Converter](https://web-toolbox.dev/en/tools/number-base-converter) - [

**TOON to JSON Converter**

Convert TOON data to standard JSON - Converter](https://web-toolbox.dev/en/tools/toon-to-json) - [

**URL Encode/Decode**

Encode or decode query values and full URLs - Encoder - Decoder](https://web-toolbox.dev/en/tools/url-encode-decode) - [

**YAML to JSON Converter**

Convert YAML data to JSON - Converter](https://web-toolbox.dev/en/tools/yaml-to-json) ### **Code**7 - [

**HTML Escape/Unescape**

Convert between HTML special characters and entities - Encoder - Decoder](https://web-toolbox.dev/en/tools/html-escape-unescape) - [

**JSON Formatter**

Format and validate JSON - Formatter - Checker](https://web-toolbox.dev/en/tools/json-formatter) - [

**JWT Decoder**

Decode and view JWT contents - Decoder](https://web-toolbox.dev/en/tools/jwt-decoder) - [

**Regex Checker**

Check how regex patterns match your text - Checker](https://web-toolbox.dev/en/tools/regex-checker) - [

**SQL Formatter**

Format SQL for readability across dialects - Formatter](https://web-toolbox.dev/en/tools/sql-formatter) - [

**UUID Validator**

Validate UUIDs and detect their versions - Checker](https://web-toolbox.dev/en/tools/uuid-validator) - [

**XML Formatter**

Format or minify XML - Formatter](https://web-toolbox.dev/en/tools/xml-formatter) ### **Security**6 - [

**Credit Card Validator**

Validate card numbers and identify brands - Checker](https://web-toolbox.dev/en/tools/credit-card-validator) - [

**CSP Parser**

Parse CSP headers and list their directives - Analyzer - Checker](https://web-toolbox.dev/en/tools/csp-parser) - [

**Password Generator**

Generate passwords in bulk with custom rules - Generator](https://web-toolbox.dev/en/tools/password-generator) - [

**SHA Hash Generator**

Hash text with SHA and MD5 algorithms at once - Calculation](https://web-toolbox.dev/en/tools/sha-hash-generator) - [

**ULID Generator**

Generate time-sortable ULIDs with timestamps - Generator](https://web-toolbox.dev/en/tools/ulid-generator) - [

**UUID/GUID Generator**

Generate UUID v4 and v7 in bulk - Generator](https://web-toolbox.dev/en/tools/uuid-generator) ### **CSS**9 - [

**Border Radius Generator**

Adjust border-radius and generate CSS - Generator](https://web-toolbox.dev/en/tools/border-radius-generator) - [

**Box Shadow Generator**

Adjust box shadows and generate CSS - Generator](https://web-toolbox.dev/en/tools/box-shadow-generator) - [

**CSS Background Pattern Generator**

Generate striped, dotted, and grid backgrounds - Generator](https://web-toolbox.dev/en/tools/css-background-pattern-generator) - [

**CSS Cursor Viewer**

Preview CSS cursor styles and behavior - Checker](https://web-toolbox.dev/en/tools/css-cursor-viewer) - [

**CSS Filter Generator**

Adjust CSS filters and generate the code - Generator](https://web-toolbox.dev/en/tools/css-filter-generator) - [

**CSS Gradient Generator**

Adjust CSS gradients and generate code - Generator](https://web-toolbox.dev/en/tools/css-gradient-generator) - [

**Gradient Text Generator**

Create gradient text with CSS - Generator](https://web-toolbox.dev/en/tools/gradient-text-generator) - [

**Squircle Generator**

Generate squircle clip-path values and SVG code - Generator](https://web-toolbox.dev/en/tools/squircle-generator) - [

**SVG to CSS Converter**

Convert SVG images to CSS code - Converter](https://web-toolbox.dev/en/tools/svg-to-css) ### **Web**7 - [

**Heading Extractor**

Extract and list heading tags from webpages - Extractor - SEO](https://web-toolbox.dev/en/tools/heading-extractor) - [

**OGP Checker**

Fetch and preview OGP information from URLs - Checker - OGP](https://web-toolbox.dev/en/tools/ogp-checker) - [

**OGP Image Simulator**

Preview OGP image layouts for X and Facebook - Simulator - OGP](https://web-toolbox.dev/en/tools/ogp-image-simulator) - [

**OGP Tag Generator**

Generate OGP meta tags for social sharing - Generator - OGP](https://web-toolbox.dev/en/tools/ogp-tag-generator) - [

**Suggest Keyword Extractor**

Extract Google search suggestions in bulk - Extractor - SEO](https://web-toolbox.dev/en/tools/suggestion-extractor) - [

**URL Bulk Opener**

Open multiple URLs in new tabs at once - URL](https://web-toolbox.dev/en/tools/url-bulk-opener) - [

**URL Parser**

Parse URLs and extract structured data - Analyzer - URL](https://web-toolbox.dev/en/tools/url-parser) ### **Color**5 - [

**Color Contrast Checker**

Check contrast ratios for text and backgrounds - Checker - Calculation](https://web-toolbox.dev/en/tools/color-contrast-checker) - [

**Color Code Converter**

View a color code in multiple notations at once - Converter](https://web-toolbox.dev/en/tools/color-converter) - [

**Color Code Extractor**

Extract dominant colors and show them in Hex - Extractor](https://web-toolbox.dev/en/tools/color-extractor) - [

**Color Eyedropper**

Pick color codes from any point in an image - Extractor](https://web-toolbox.dev/en/tools/color-eyedropper) - [

**Tailwind Color Palette Generator**

Convert a base color into an 11-step Tailwind palette - Generator](https://web-toolbox.dev/en/tools/tailwind-color-palette) ### **Image**15 - [

**Image Base64 Decode**

Decode Base64 strings into image files - Decoder - Download](https://web-toolbox.dev/en/tools/base64-decode-image) - [

**Image Base64 Encode**

Convert images to Base64 strings in bulk - Encoder](https://web-toolbox.dev/en/tools/base64-encode-image) - [

**Dummy Image Generator**

Generate placeholder images in custom sizes - Generator - Download](https://web-toolbox.dev/en/tools/dummy-image-generator) - [

**Image Compare Slider**

Compare two images with a slider - Comparison](https://web-toolbox.dev/en/tools/image-compare-slider) - [

**Image Resizer**

Resize images while maintaining aspect ratio - Converter - Download](https://web-toolbox.dev/en/tools/image-resizer) - [

**JPG Converter**

Convert images to JPG in bulk - Converter - Download](https://web-toolbox.dev/en/tools/jpg-converter) - [

**Pixel Art Converter**

Convert images into pixel art - Converter - Download](https://web-toolbox.dev/en/tools/pixelart-converter) - [

**PNG Converter**

Convert images to PNG in bulk - Converter - Download](https://web-toolbox.dev/en/tools/png-converter) - [

**QR Code Generator**

Generate QR codes from URLs and text - Generator - QR Code](https://web-toolbox.dev/en/tools/qrcode-generator) - [

**QR Code Reader**

Read QR codes from images or camera input - Decoder - QR Code](https://web-toolbox.dev/en/tools/qrcode-reader) - [

**Rounded Corner Image Generator**

Round image corners and save as PNG - Generator - Download](https://web-toolbox.dev/en/tools/rounded-corner-image-generator) - [

**SVG Blob Generator**

Generate organic blob-shaped SVGs - Generator - Download](https://web-toolbox.dev/en/tools/svg-blob-generator) - [

**Video Frame Extractor**

Extract selected video frames as images - Extractor - Download](https://web-toolbox.dev/en/tools/video-frame-extractor) - [

**WebP Converter**

Convert images to WebP and reduce file size - Converter - Download](https://web-toolbox.dev/en/tools/webp-converter) - [

**YouTube Thumbnail Downloader**

Get YouTube thumbnails in multiple sizes - Download - URL](https://web-toolbox.dev/en/tools/youtube-thumbnail-downloader) ### **Date & Time**3 - [

**Business Day Calendar**

Check business days and working hours on a calendar - Calculation](https://web-toolbox.dev/en/tools/business-calendar) - [

**Cron Expression Parser**

Parse cron expressions and preview upcoming scheduled runs - Analyzer](https://web-toolbox.dev/en/tools/cron-parser) - [

**Epoch Converter**

Convert between UNIX timestamps and dates - Converter - Calculation](https://web-toolbox.dev/en/tools/epoch-converter) ### **Calculation**5 - [

**Aspect Ratio Calculator**

Convert between ratio and dimensions - Calculation](https://web-toolbox.dev/en/tools/aspect-ratio-calculator) - [

**Golden Ratio Calculator**

Calculate dimensions and splits with golden and silver ratios - Calculation](https://web-toolbox.dev/en/tools/golden-ratio-calculator) - [

**Nested Border-Radius Optimization**

Calculate a concentric inner border-radius - Calculation](https://web-toolbox.dev/en/tools/nested-border-radius-calculator) - [

**Percentage・PX Calculator**

Convert percentages and pixels from a parent size - Converter](https://web-toolbox.dev/en/tools/percentage-px-calculator) - [

**PX・Rem Calculator**

Convert px and rem both ways - Converter](https://web-toolbox.dev/en/tools/px-rem-calculator) ### **Network**2 - [

**IP Address Checker**

Check your global IP and network details - Checker](https://web-toolbox.dev/en/tools/ip-address-checker) - [

**Subdomain Lookup**

List subdomains associated with a domain - Analyzer](https://web-toolbox.dev/en/tools/subdomain-lookup) ## **Frequently Asked Questions** Web ToolBox is a free online tool collection that anyone can use. We offer over 70 web development tools to help designers and developers work more efficiently! Yes, all tools are completely free to use. We have various categories including text processing, data conversion, code, images, colors, and more. Nope, no account required. Just open your browser and start using the tools right away! Most tools run entirely in your browser, so your data never leaves your device. For tools that need server processing, we use encrypted connections and never store your data. Use the feedback form on any tool page. We'd love to hear your ideas and tool requests! Latest versions of Chrome, Firefox, Edge, and Safari work best. Older browsers might have limited functionality. Yes! We're constantly adding new tools based on your feedback. Please report it through the feedback form. We'll fix it as soon as possible! ## **Listed On** - [![Featured on findly.tools](https://findly.tools/badges/findly-tools-badge-light.svg)](https://findly.tools/web-toolbox) - [![Listed on Turbo0](https://img.turbo0.com/badge-listed-light.svg)](https://turbo0.com/item/web-toolbox) - [![Featured on SaaSTool.site](https://saastool.site/badges/saastool-dark.svg)](https://saastool.site/item/web-toolbox) - [![Featured on SaaSHub](https://cdn-b.saashub.com/img/badges/approved-color.png?v=1)](https://www.saashub.com/web-toolbox?badge_variant=color&badge_kind=approved) [![PicDiff](https://web-toolbox.dev/images/picdiff-logo.webp)**PicDiff** - Spot image differences instantly A new image comparison tool. Slider, split view, and fade modes. Compare subtle differences in AI-generated and other images right in your browser.](https://picdiff.dev) ```json {"@context":"https://schema.org","@graph":[{"@id":"https://web-toolbox.dev/en#website","@type":"WebSite","description":"アカウント登録不要で使える無料Web開発ツール80種類以上。JSON整形、Base64変換、カラーコード変換、QRコード生成などをブラウザ上で瞬時に実行。開発者の作業効率を大幅に向上させます。","inLanguage":"en-US","name":"Web ToolBox","url":"https://web-toolbox.dev/en","translationOfWork":{"@id":"https://web-toolbox.dev/#website"}},{"@id":"https://web-toolbox.dev/en#webpage","@type":"WebPage","description":"80+ free web development tools with no sign-up required. Instantly format JSON, convert Base64, transform color codes, generate QR codes and more in your browser. Dramatically boost your development productivity.","name":"Web ToolBox","url":"https://web-toolbox.dev/en","isPartOf":{"@id":"https://web-toolbox.dev/en#website"},"potentialAction":[{"@type":"ReadAction","target":["https://web-toolbox.dev/en"]}]}]} ``` ## Sitemap See the full [sitemap](https://web-toolbox.dev/sitemap.md) for all pages.