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Free Dev Tools For Developer

Word Frequency Counter

Counts how often each word appears in a block of text and ranks the most frequent ones, with stopword filtering and minimum length controls.

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Find and Replace

Finds and replaces text or regex patterns across a block of text, with case-sensitivity and replace-all/first-only options, plus a live match count.

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Color Name Finder

Finds the closest standard CSS named colors (like IndianRed or SteelBlue) to any hex color, ranked by color distance.

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Text to Speech

Converts typed text into spoken audio using your browser's built-in voices, with adjustable rate and pitch — no server or API key required.

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Roman Numeral Converter

Converts numbers (1-3999) to Roman numerals and back, validating that the entered Roman numeral is in canonical form.

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Duration Calculator

Converts a time duration between milliseconds, seconds, minutes, hours, days, weeks, months, and years — handy for TTLs, timeouts, and cron intervals.

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Age Calculator

Calculates exact age in years, months, and days between two dates, plus total days/weeks lived and days until the next birthday.

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Character Limit Checker

Checks a block of text against the character limits of X/Twitter, SMS, SEO tags, Instagram, LinkedIn, YouTube, and more, all at once.

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Percentage Calculator

Calculates X% of Y, what percent X is of Y, and the percentage change between two numbers, all updating live.

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Password Strength Checker

Analyzes an existing password for length, character variety, common-password matches, and sequential or repeated patterns, with an entropy-based strength score.

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Barcode Generator

Generates scannable barcodes (CODE128, CODE39, EAN-13/8, UPC, ITF-14, and more) from a value, with PNG download.

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Morse Code Translator

Translates text to and from Morse code in real time, with an audible playback of the dots and dashes using the Web Audio API.

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Random Number Generator

Generates a batch of random integers or decimals within a range, with options for duplicates, decimal precision, and quick sum/average stats.

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Git Command Cheat Sheet

A searchable reference of common Git commands — branching, merging, remotes, history, undo, stash, and tags — with one-click copy.

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ASCII Table

A searchable reference of all 128 ASCII characters with their decimal, hexadecimal, octal, and binary codes, including control character names.

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Regex Cheat Sheet

A searchable reference of common regular expression syntax — character classes, anchors, quantifiers, groups, lookaround, and flags — with examples.

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IBAN Validator

Validates an International Bank Account Number using the ISO 7064 mod-97 checksum and identifies its country and check digits.

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Credit Card Validator

Checks whether a card number passes the Luhn checksum used by real issuers and detects its network (Visa, Mastercard, Amex, etc.) — for testing form validation, not real transactions.

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UUID Validator

Validates a UUID's format and identifies its RFC 4122 version (v1-v8) and variant, flagging the special nil and max UUIDs.

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Semver Comparator

Parses two semantic version strings into their major, minor, patch, and prerelease components and determines which one is greater according to the semver spec.

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CSS Unit Converter

Converts a CSS length between px, rem, em, pt, %, vw, and vh, with configurable base font size and viewport dimensions.

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Text Line Tools

Sorts, deduplicates, trims, reverses, or shuffles the lines of a block of text, with live line-count statistics.

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.env File Parser

Parses .env file contents into a table with masked secret values, duplicate-key detection, and converts to JSON or shell export statements.

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JSON Path Finder

Queries a JSON document with a simplified path syntax ($.key, [index], [*], .*) and shows every matching value, useful for exploring large API responses.

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SVG to PNG

Converts pasted SVG markup into a downloadable PNG image at a configurable scale, rendered entirely in the browser.

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robots.txt Generator

Generates a robots.txt file from allow/disallow path rules, crawl-delay, and a sitemap URL, with copy and download options.

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HTTP Status Codes

A searchable reference of standard HTTP status codes with their meaning, color-coded by class (1xx-5xx).

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Markdown to HTML

Converts Markdown into HTML source you can copy and embed, with both a raw HTML view and a sanitized live preview.

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Emoji Picker

Searches nearly 2,000 emoji by name or keyword and copies the selected emoji to your clipboard with one click.

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cURL to fetch()

Parses a curl command (method, headers, body, basic auth) and converts it into an equivalent JavaScript fetch() snippet.

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File to Base64

Converts any uploaded file into a Base64 string or data URI, and converts a pasted Base64 string or data URI back into a downloadable file.

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String Escape Unescape

Escapes multi-line text into a safe JS/JSON string literal (newlines, tabs, quotes, backslashes) or unescapes an escaped string back into plain text.

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Timezone Converter

Shows what a chosen date and time in your local timezone looks like across major cities worldwide, with UTC offsets, for scheduling meetings and calls.

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Placeholder Image Generator

Generates placeholder image URLs (via Lorem Picsum) with a custom size, seed, grayscale, and blur, plus ready-to-copy HTML and Markdown snippets.

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URL Parser

Breaks a URL down into protocol, host, port, path, and hash, and lets you inspect and edit query string parameters with the result URL updating live.

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Color Contrast Checker

Calculates the WCAG contrast ratio between a text and background color and checks it against AA and AAA accessibility thresholds, with a live text preview.

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Code Beautifier

Formats and indents messy HTML, CSS, or JavaScript code into a clean, readable style with configurable indent size.

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JSON Schema Validator

Validates a JSON document against a JSON Schema (draft-07) in real time, listing every validation error with its path when the data doesn't conform.

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XML JSON Converter

Converts XML documents to JSON and back, preserving attributes and text content, useful for working with SOAP APIs, RSS feeds, and legacy config formats.

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CSS Box Shadow Generator

Builds single or multi-layer CSS box-shadows visually with offset, blur, spread, color, and inset controls, with a live preview and copyable CSS.

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Mock Data Generator

Builds a custom schema of named fields backed by realistic fake data (names, emails, addresses, and more) and generates sample rows as JSON or CSV.

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Meta Tag Generator

Generates SEO, Open Graph, and Twitter Card meta tags from a title, description, URL, and image, with a live social-share preview card.

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Favicon Generator

Generates a full set of favicon and touch-icon sizes (16 to 512px) from a single uploaded image, with per-size downloads and a ready-to-paste HTML snippet.

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ULID / NanoID Generator

Generates ULIDs (sortable, timestamp-prefixed identifiers) or NanoIDs (compact, URL-safe random identifiers) in bulk as a modern alternative to UUIDs.

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Basic Auth Header Generator

Generates an HTTP Basic Authentication header from a username and password by base64-encoding the credentials, ready to paste into API clients or curl commands.

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Image Scale Up

Upscales an image by 2x, 3x, or 4x directly in the browser using Lanczos resampling for sharper results than simple pixel duplication, with no upload to a server.

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JSON Diff

Compares two JSON documents side by side and lists every added, removed, and changed key with its full path, useful for reviewing API response or config changes.

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Unicode Character Inspector

Breaks down text character by character, showing each Unicode code point, decimal value, HTML entity, and UTF-8 byte sequence — useful for debugging encoding issues and emoji.

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Chmod Calculator

Converts Unix file permissions between checkbox, symbolic (rwxr-xr-x), and octal (755) notation, with common presets and a ready-to-run chmod command.

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CSS Gradient Generator

Builds linear and radial CSS gradients visually with multiple color stops, adjustable angle and stop positions, and copyable CSS output.

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JSON to TypeScript

Infers TypeScript interfaces from a JSON object, automatically generating nested interfaces for embedded objects and arrays.

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Markdown Table Generator

Converts pasted CSV or TSV (spreadsheet) data into a properly formatted Markdown table, with configurable column alignment.

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.gitignore Generator

Generates a combined .gitignore file by picking from common language, framework, editor, and OS templates (Node, Python, Next.js, macOS, VSCode, and more).

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Base32 Encode Decode

Encodes text into RFC 4648 Base32 format or decodes Base32 strings back into plain text, commonly used for TOTP secrets and case-insensitive identifiers.

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Cron Expression Parser

Parses a 5-field cron expression, breaks it down field by field, and lists the next 5 scheduled run times.

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Color Palette Generator

Generates tints, shades, and complementary/triadic/analogous color harmonies from a single base color, with click-to-copy hex swatches.

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IPv4 Subnet Calculator

Calculates network address, broadcast address, subnet mask, wildcard mask, usable host range, and host count from an IPv4 address and CIDR prefix.

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HMAC Generator

Generates HMAC (Hash-based Message Authentication Code) signatures for a message using a secret key, supporting MD5, SHA-1, SHA-256, and SHA-512, with hex and base64 output.

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Slug Generator

Converts any text into a clean, URL-friendly slug by stripping accents and special characters, with configurable hyphen or underscore separators.

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Word Counter

Counts characters, words, sentences, and paragraphs in real time as you type, and estimates reading and speaking time.

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JSON CSV Converter

Converts JSON arrays of objects into CSV files, and CSV files back into JSON, with support for quoted fields containing commas, quotes, and newlines.

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HTML Entity Encode Decode

Encodes special characters into HTML entities (e.g. & → &) or decodes HTML entities back into plain text, useful for safely embedding text in HTML markup.

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Regex Tester

Tests regular expressions against sample text in real time, with configurable flags, highlighted matches, capture groups, and match index details.

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Text Case Converter

Converts text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, Sentence case, UPPERCASE, lowercase, and dot.case with one-click copy.

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Password Generator

Generates cryptographically secure random passwords with configurable length and character sets (uppercase, lowercase, numbers, symbols), plus an entropy-based strength meter.

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Timestamp Converter

Converts Unix timestamps (seconds or milliseconds) to human-readable local and UTC dates, and vice versa. Includes a live-updating current timestamp and ISO 8601 output.

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RGBA To Hex

RGBA to HEX Converter is a developer utility that transforms RGB and RGBA color values into hexadecimal format with a single click, supporting both standard 6-digit hex codes and 8-digit codes with alpha channel.

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Color Hex To RGBA

Our HEX to RGBA Converter is an intuitive developer tool that instantly transforms hexadecimal color codes into RGB and RGBA format, supporting both 6-digit standard hex codes and 8-digit codes with alpha transparency.

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MD5 Hash Generator

A fast and efficient tool for generating MD5 hashes from your text or files. MD5 (Message Digest Algorithm 5) produces a 128-bit (16-byte) hash value, typically expressed as a 32-character hexadecimal string.

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SHA-512 Hash Generator

A robust cryptographic tool that transforms your text or files into SHA-512 hash values. SHA-512 (Secure Hash Algorithm 512-bit) is an advanced cryptographic hash function that generates a fixed-size 512-bit (64-byte) hash, typically displayed as a 128-character hexadecimal string.

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SHA-256 Hash Generator

A powerful and secure hashing tool that converts your text or files into SHA-256 hash values. SHA-256 (Secure Hash Algorithm 256-bit) is a cryptographic hash function that produces a fixed-size 256-bit (32-byte) hash value, typically represented as a 64-character hexadecimal string.

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SHA-1 Hash Generator

Convert your text or files into SHA-1 hash values. SHA-1 (Secure Hash Algorithm 1) produces a 160-bit (20-byte) hash value, typically rendered as a 40-digit hexadecimal number.

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JSON Formatter

Formats and beautifies JSON data for better readability. It ensures proper indentation and structure, making it easier to analyze and debug.

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Random Text

Generates random text that can be used for testing, placeholders, or design mockups. Supports various text patterns and customization options.

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YAML to JSON

Converts YAML data into a structured JSON format. This tool helps developers work seamlessly between YAML and JSON-based configurations.

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Diff Tool

Compares two text inputs and highlights their differences. Useful for code reviews, debugging, and tracking changes between document versions.

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Markdown Viewer

Renders Markdown files into a properly formatted preview. Supports headings, tables, code blocks, and more for an enhanced viewing experience.

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SQL Formatter

Formats SQL queries for better readability and consistency. It automatically adjusts indentation, capitalizes keywords, and improves query structure.

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JWT Tools

Decodes and validates JWT tokens for debugging and security analysis. It extracts claims, expiration details, and verifies signatures if applicable.

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UUID Generator

Generates universally unique identifiers (UUIDs) in different versions. Useful for database records, session tracking, and unique key assignments.

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JavaScript Object to JSON

Converts JavaScript objects into a properly formatted JSON string. Ensures compatibility with APIs, storage, and data exchange processes.

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QR Code Generator

Creates QR codes for URLs, text, contact information, and more. It supports customization options for color, size, error correction, and output formats.

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QR Code Reader

Scans and decodes QR codes from images or camera streams. It extracts information from QR codes and displays the content for easy access.

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URL Encode Decode

Encodes and decodes URLs to ensure proper data transmission. It converts special characters into percent-encoded format and vice versa.

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Base64 Encode Decode

Encodes and decodes text or binary data using Base64 encoding. It converts data into a printable ASCII format for safe transmission and storage.

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Number Formatter

Numbers are converted to binary, octal, hexadecimal, or vice versa.

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