Developer Tools Tools (40)

Developer

Base64 to Image Converter

Convert a Base64 string or data URI back to a downloadable image. Auto-detects format, shows preview, and lets you download as PNG, JPG, or WebP.

💻 Developer Tools

Cron Expression Builder

Build and understand cron expressions with an interactive visual editor. Click to set schedules, see plain-English translations and next run times.

💻 Developer Tools

HTML Encoder / Decoder

Encode special characters to HTML entities or decode HTML entities back to text. Handles all named and numeric entities with live preview.

💻 Developer Tools

Image to Base64 Converter

Convert any image to a Base64 encoded string or data URI online for free. Supports PNG, JPG, and WebP output formats. Copy with one click.

💻 Developer Tools

JSON Minifier

Minify JSON by removing all whitespace and formatting. See the size reduction instantly. Free online JSON compressor with copy button.

💻 Developer Tools

JSON Prettifier

Format and pretty-print JSON with proper indentation online. Choose 2 spaces, 4 spaces, or tabs. Instant formatting with error detection and stats.

💻 Developer Tools

JSON Validator

Validate JSON syntax and find errors with line numbers online for free. Real-time validation as you type with detailed error messages and stats.

💻 Developer Tools

Markdown to HTML Converter

Convert Markdown to HTML code online for free. Supports headings, bold, italic, links, code blocks, lists, blockquotes, and more. Live preview included.

💻 Developer Tools

QR Code Generator

Generate QR codes for website URLs and plain text. Download as PNG or SVG with custom colours. Free, instant, no sign-up required.

💻 Developer Tools

Json

CSV to JSON Converter

Convert CSV data to JSON format online. Auto-detects delimiters, supports headers as keys, and outputs pretty or compact JSON. Copy with one click.

💻 Developer Tools

JSON Escape / Unescape

Escape special characters in strings for JSON or unescape JSON strings back to readable text. Handles newlines, tabs, quotes, and backslashes.

💻 Developer Tools

JSON Formatter & Validator

Format, minify and validate JSON with syntax highlighting. Shows error locations, key count, nesting depth and size stats

💻 Developer Tools

JSON Minifier

Minify JSON by removing all whitespace and formatting. See the size reduction instantly. Free online JSON compressor with copy button.

💻 Developer Tools

JSON Prettifier

Format and pretty-print JSON with proper indentation online. Choose 2 spaces, 4 spaces, or tabs. Instant formatting with error detection and stats.

💻 Developer Tools

JSON to CSV Converter

Convert JSON arrays to CSV format online. Handles nested objects with dot notation, supports comma/tab/semicolon delimiters. Copy or download the CSV.

💻 Developer Tools

JSON to Plain Text

Extract plain text values from JSON data. Recursively walks the JSON structure and outputs values, keys, or full paths as readable text.

💻 Developer Tools

JSON Validator

Validate JSON syntax and find errors with line numbers online for free. Real-time validation as you type with detailed error messages and stats.

💻 Developer Tools

JWT Decoder

Decode JWT tokens to see the header, payload and expiry status. Colour-coded sections with formatted JSON output. Paste any JWT to inspect its contents.

💻 Developer Tools

Web

CSS Box Shadow Generator

Build CSS box shadows visually with live preview. Adjust offset, blur, spread, colour, and opacity. Stack multiple layers and copy the CSS.

💻 Developer Tools

CSS Gradient Generator

Create beautiful CSS gradients with a visual builder. Choose colours, positions, angles, and gradient type. Copy the CSS with vendor prefixes.

💻 Developer Tools

CSS Minifier

Minify CSS by removing comments, whitespace and unnecessary characters. See original and minified size with savings percentage. Copy or download the result.

💻 Developer Tools

JavaScript Minifier

Minify JavaScript by removing comments and collapsing whitespace. See compression statistics with original and minified size comparison.

💻 Developer Tools

JWT Decoder

Decode JWT tokens to see the header, payload and expiry status. Colour-coded sections with formatted JSON output. Paste any JWT to inspect its contents.

💻 Developer Tools

Pixel to REM Converter

Convert pixels to REM units and back. Set your base font size, see a reference table of common values, and copy CSS with one click.

💻 Developer Tools

HTML Entity Encoder

Encode text to HTML entities or decode entities back to text. Handles named, numeric and hex entities. Bulk text support with instant copy to clipboard.

💻 Developer Tools

Slug Generator

Convert any title or text into a clean URL-friendly slug. Options for separator style, max length and accent transliteration. Copy to clipboard instantly.

📝 Text Tools

Text

HTML to Text Converter

Strip HTML tags and extract plain text content. Optionally preserves line breaks from block elements like paragraphs, divs, and list items.

💻 Developer Tools

JSON to Plain Text

Extract plain text values from JSON data. Recursively walks the JSON structure and outputs values, keys, or full paths as readable text.

💻 Developer Tools

QR Code Generator

Generate QR codes for website URLs and plain text. Download as PNG or SVG with custom colours. Free, instant, no sign-up required.

💻 Developer Tools

String to Binary Converter

Convert text to binary and binary back to text. Bidirectional conversion with space, none, or newline separator options. Shows byte count.

💻 Developer Tools

Lorem Ipsum Generator

Generate placeholder lorem ipsum text by paragraphs, sentences or words. Copy to clipboard with word and character count display

💻 Developer Tools

Slug Generator

Convert any title or text into a clean URL-friendly slug. Options for separator style, max length and accent transliteration. Copy to clipboard instantly.

📝 Text Tools

Csv

CSV Column Extractor

Select and extract specific columns from CSV data. Auto-detects headers and lets you toggle which columns to include in the output.

💻 Developer Tools

CSV Delimiter Changer

Change the delimiter in CSV files from comma to tab, semicolon, pipe, or any custom character. Auto-detects the input delimiter.

💻 Developer Tools

CSV to JSON Converter

Convert CSV data to JSON format online. Auto-detects delimiters, supports headers as keys, and outputs pretty or compact JSON. Copy with one click.

💻 Developer Tools

CSV Transpose

Swap rows and columns in CSV data. Converts rows to columns and columns to rows with a live preview showing the dimension change.

💻 Developer Tools

CSV Validator

Validate CSV structure and find problems like inconsistent column counts, unclosed quotes, and empty rows. Live validation with line numbers.

💻 Developer Tools

JSON to CSV Converter

Convert JSON arrays to CSV format online. Handles nested objects with dot notation, supports comma/tab/semicolon delimiters. Copy or download the CSV.

💻 Developer Tools

Css

CSS Box Shadow Generator

Build CSS box shadows visually with live preview. Adjust offset, blur, spread, colour, and opacity. Stack multiple layers and copy the CSS.

💻 Developer Tools

CSS Gradient Generator

Create beautiful CSS gradients with a visual builder. Choose colours, positions, angles, and gradient type. Copy the CSS with vendor prefixes.

💻 Developer Tools

CSS Minifier

Minify CSS by removing comments, whitespace and unnecessary characters. See original and minified size with savings percentage. Copy or download the result.

💻 Developer Tools

Image to Data URI Converter

Convert any image to a data URI string for embedding directly in HTML or CSS. Supports PNG, JPG, and WebP output formats.

💻 Developer Tools

Pixel to REM Converter

Convert pixels to REM units and back. Set your base font size, see a reference table of common values, and copy CSS with one click.

💻 Developer Tools

Decode

Base64 to Image Converter

Convert a Base64 string or data URI back to a downloadable image. Auto-detects format, shows preview, and lets you download as PNG, JPG, or WebP.

💻 Developer Tools

HTML Encoder / Decoder

Encode special characters to HTML entities or decode HTML entities back to text. Handles all named and numeric entities with live preview.

💻 Developer Tools

JSON Escape / Unescape

Escape special characters in strings for JSON or unescape JSON strings back to readable text. Handles newlines, tabs, quotes, and backslashes.

💻 Developer Tools

QR Code Reader

Scan and decode QR codes from uploaded images. Uses your browser's built-in barcode detection. Shows the decoded text or URL with copy and open buttons.

💻 Developer Tools

String to Binary Converter

Convert text to binary and binary back to text. Bidirectional conversion with space, none, or newline separator options. Shows byte count.

💻 Developer Tools

Html

HTML Encoder / Decoder

Encode special characters to HTML entities or decode HTML entities back to text. Handles all named and numeric entities with live preview.

💻 Developer Tools

HTML to Text Converter

Strip HTML tags and extract plain text content. Optionally preserves line breaks from block elements like paragraphs, divs, and list items.

💻 Developer Tools

Image to Data URI Converter

Convert any image to a data URI string for embedding directly in HTML or CSS. Supports PNG, JPG, and WebP output formats.

💻 Developer Tools

Markdown to HTML Converter

Convert Markdown to HTML code online for free. Supports headings, bold, italic, links, code blocks, lists, blockquotes, and more. Live preview included.

💻 Developer Tools

HTML Entity Encoder

Encode text to HTML entities or decode entities back to text. Handles named, numeric and hex entities. Bulk text support with instant copy to clipboard.

💻 Developer Tools

Base64

Base64 to Image Converter

Convert a Base64 string or data URI back to a downloadable image. Auto-detects format, shows preview, and lets you download as PNG, JPG, or WebP.

💻 Developer Tools

Image to Base64 Converter

Convert any image to a Base64 encoded string or data URI online for free. Supports PNG, JPG, and WebP output formats. Copy with one click.

💻 Developer Tools

Image to Data URI Converter

Convert any image to a data URI string for embedding directly in HTML or CSS. Supports PNG, JPG, and WebP output formats.

💻 Developer Tools

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text. Supports UTF-8 with auto-convert mode and copy buttons

💻 Developer Tools

Decoder

JWT Decoder

Decode JWT tokens to see the header, payload and expiry status. Colour-coded sections with formatted JSON output. Paste any JWT to inspect its contents.

💻 Developer Tools

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text. Supports UTF-8 with auto-convert mode and copy buttons

💻 Developer Tools

HTML Entity Encoder

Encode text to HTML entities or decode entities back to text. Handles named, numeric and hex entities. Bulk text support with instant copy to clipboard.

💻 Developer Tools

URL Encoder / Decoder

Encode and decode URLs and query parameters. Supports encodeURIComponent for params and encodeURI for full URLs

💻 Developer Tools

Image

Aspect Ratio Calculator

Calculate and convert aspect ratios for images and video. Lock ratios, use platform presets for Instagram, YouTube, TikTok, and more. Shows megapixels and orientation.

🎨 Creative & Design

Base64 to Image Converter

Convert a Base64 string or data URI back to a downloadable image. Auto-detects format, shows preview, and lets you download as PNG, JPG, or WebP.

💻 Developer Tools

Image to Base64 Converter

Convert any image to a Base64 encoded string or data URI online for free. Supports PNG, JPG, and WebP output formats. Copy with one click.

💻 Developer Tools

Image to Data URI Converter

Convert any image to a data URI string for embedding directly in HTML or CSS. Supports PNG, JPG, and WebP output formats.

💻 Developer Tools

Encode

HTML Encoder / Decoder

Encode special characters to HTML entities or decode HTML entities back to text. Handles all named and numeric entities with live preview.

💻 Developer Tools

Image to Base64 Converter

Convert any image to a Base64 encoded string or data URI online for free. Supports PNG, JPG, and WebP output formats. Copy with one click.

💻 Developer Tools

JSON Escape / Unescape

Escape special characters in strings for JSON or unescape JSON strings back to readable text. Handles newlines, tabs, quotes, and backslashes.

💻 Developer Tools

String to Binary Converter

Convert text to binary and binary back to text. Bidirectional conversion with space, none, or newline separator options. Shows byte count.

💻 Developer Tools