Developer Tools
53 tools available
Base64 Encoder / Decoder
Encode and decode Base64 text instantly, convert files to Base64, create data URLs, and use URL-safe Base64 when needed.
Base64 Image Encoder
Convert images to Base64 encoded strings for embedding directly in HTML and CSS.
Binary Addition Calculator
Binary to Text Converter
Convert binary code to readable text and text to binary instantly in your browser.
Border Radius Generator
Chart Maker
Create bar, line, pie, doughnut, area, scatter, and horizontal bar charts online from your data and download them as PNG images.
Chmod Calculator
Color Contrast Checker
Check WCAG contrast ratio between text and background colors. Get AA and AAA compliance status.
Color Palette Generator
Generate beautiful color palettes — complementary, triadic, analogous, monochromatic, and more.
Color Picker & Converter
Pick colors and convert between HEX, RGB, RGBA, HSL, HSV, CMYK and CSS color formats instantly.
Cron Expression Generator
Build and validate cron expressions visually with a plain-English schedule description.
CSS Box Shadow Generator
Visually generate CSS box-shadow with live preview — multiple layers, colors, inset support.
CSS Generator
Generate CSS for gradients, shadows, borders, and animations with a live preview.
CSS Gradient Generator
Create beautiful linear, radial, and conic CSS gradients visually — copy the CSS code in one click.
CSS Minifier & Beautifier
Minify CSS to reduce file size or beautify compressed CSS back to readable format instantly.
CSV to JSON Converter
Convert CSV files to JSON instantly — handles headers, custom delimiters, and nested output.
Data Converter
Convert JSON, CSV, XML, YAML, and TOML between any format instantly in your browser.
Favicon Generator
Generate favicons in all required sizes from any image, emoji, or text. Download as ICO and PNG.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes. Compare and verify hashes.
Hex to Text Converter
HTML Encoder / Decoder
Encode special characters to HTML entities or decode HTML entities back to plain text instantly.
HTML Minifier
Minify HTML code to reduce file size by removing whitespace, comments, and redundant tags.
HTML Table Generator
Build HTML, Markdown, and CSV tables visually and copy the code with one click.
HTML to Text Converter
HTTP Status Codes Reference
IP Subnet Calculator
Calculate subnet mask, network address, broadcast address, and usable hosts from CIDR notation.
JavaScript Minifier
Minify JavaScript to reduce file size by removing whitespace, comments, and shortening names.
JSON Formatter
Format, validate, minify and analyze JSON with syntax highlighting and stats.
JSON Minifier
JSON to CSV Converter
Convert JSON arrays to CSV format instantly — flatten nested objects, custom headers.
JSON Validator
JWT Decoder
Decode and inspect JWT tokens instantly. View header, payload claims, and expiry — no server needed.
MAC Address Generator
Markdown to HTML Converter
Convert Markdown to clean HTML instantly. Preview rendered output and copy the HTML in one click.
Number Base Converter
Convert numbers between binary, decimal, hexadecimal, and octal instantly with our free online number base converter.
Password Generator
Generate multiple strong passwords with strength scoring and custom rules.
Password Strength Checker
Check how strong your password is and get specific advice on how to improve it.
PDF Tools
Convert, compress, merge, split, and extract PDF pages — all free in your browser.
px to rem Converter
Convert pixel values to rem units instantly — with a custom base font size for accurate CSS calculations.
QR Code Scanner
Scan and decode QR codes from uploaded images or your device camera — no app needed.
Regex Tester
Test and debug regular expressions in real time. Highlights matches, shows capture groups, and includes a cheat sheet.
Screen Color Picker
Pick any color from your screen and get its HEX, RGB, HSL, and OKLCH values instantly.
Screen Resolution Checker
Instantly see your screen resolution, viewport size, device pixel ratio, and browser dimensions.
Signature Generator
Draw, type, or upload a digital signature and download it as transparent PNG or SVG free.
Speech to Text
Convert your voice to text instantly in 16 languages — free, browser-based.
Text Encryption
Encrypt and decrypt text using Caesar cipher, ROT13, Vigenere, Atbash, and Base64.
Text to Binary Converter
Text to Hex Converter
Unicode Character Lookup
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports milliseconds, seconds, and multiple time zones.
URL Encoder / Decoder
Encode plain text to URL-safe format or decode percent-encoded URLs back to readable text instantly.
UUID Generator
Generate UUIDs (v1, v4, v5) in bulk. Format as uppercase, lowercase, or without hyphens.
XML Formatter & Validator
Beautify, validate, and minify XML instantly in your browser — no upload, no signup, completely private.
About Developer Tools Tools
The Developer Tools category is built for software engineers, web developers, and technical professionals who need fast, reliable utilities in their daily workflow. Every tool in this category runs 100% client-side with zero data upload — critical when working with sensitive API keys, private JSON payloads, or confidential data. The JSON Formatter and Validator lets you instantly beautify minified API responses, minify JSON for production, validate syntax, and sort keys alphabetically for easy comparison. The Base64 Encoder and Decoder handles text-to-Base64 and Base64-to-text conversion with URL-safe mode support, plus binary file encoding for generating data URIs. The Password Generator produces cryptographically secure random passwords using the browser's Web Crypto API, with full control over length, character sets, and ambiguous character exclusion. The Hash Generator computes MD5, SHA-1, SHA-256, and SHA-512 hashes in real time, with a compare mode for checksum verification. Whether you need to debug an API response, verify a file download checksum, or generate a strong password, these tools are designed to be fast, private, and available instantly with no account required.
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