Developer Tools Directory
Privacy-first utilities designed for high performance, local browser processing, and developer productivity.
JSON Formatter
Format, indent, validate and beautify messy JSON strings with instant syntax highlighting.
JSON Validator
Validate JSON syntax and identify exact error line numbers and column positions.
JSON Viewer
Interactive hierarchical tree viewer for nested JSON objects and arrays.
JSON Minifier
Minify and compress JSON strings by stripping whitespace and line breaks.
JWT Decoder
Decode and inspect JSON Web Token header, payload claims, and expiration timestamps.
JWT Generator
Generate and sign JSON Web Tokens with custom header, payload and secret key.
Base64 Encoder
Convert plain text, code, or UTF-8 strings into standard Base64 encoding.
Base64 Decoder
Decode Base64 encoded strings back to human-readable plain text.
URL Encoder
Percent-encode query parameters, special characters and URLs for HTTP safe transmission.
URL Decoder
Decode percent-encoded URL strings and query parameters to plain readable text.
HTML Formatter
Beautify, indent, and format messy HTML markup into clean, readable code.
HTML Minifier
Minify HTML markup by stripping comments, excess spaces, and line breaks.
CSS Formatter
Prettify and format CSS stylesheets with clean indentation and property sorting.
CSS Minifier
Compress CSS stylesheets by removing whitespace, comments, and redundant rules.
JavaScript Formatter
Format and beautify JavaScript / ECMAScript source code with proper syntax structure.
JavaScript Minifier
Minify JavaScript scripts by stripping comments, spaces, and line feeds.
Regex Tester
Test and debug Regular Expressions in real-time with instant match highlighting.
SQL Formatter
Format and beautify complex SQL queries with uppercase keywords and clean indentation.
SQL Beautifier
Beautify and structure SQL statements for optimal database code readability.
UUID Generator
Generate cryptographically secure Version 4 (v4) UUIDs in bulk or single format.
Timestamp Converter
Convert Unix epochs (seconds and milliseconds) to human-readable dates and vice versa.
Unix Timestamp Converter
Real-time Unix epoch clock and bidirectional date-to-epoch converter.
Color Converter
Convert colors between HEX, RGB, HSL, HSV, and CMYK formats with visual color picker.
HEX to RGB
Convert HEX color codes (#RGB and #RRGGBB) to RGB / RGBA values.
RGB to HEX
Convert RGB color values (Red, Green, Blue) to 6-character HEX color strings.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time in real-time.
Character Counter
Real-time character counter with space breakdown, byte size, and limit indicators.
Line Counter
Count total lines, non-empty lines, empty lines, and line length statistics in code or text.
QR Code Generator
Generate custom QR codes for URLs, text, Wi-Fi credentials, and contact info with PNG download.
Barcode Generator
Generate 1D and 2D barcodes online in Code 128, EAN-13, UPC-A, Code 39, ITF-14, and Codabar formats with instant SVG and PNG vector download.
Password Generator
Generate strong, cryptographically secure random passwords and passphrases.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum dummy text by paragraphs, sentences, or words.
Markdown Editor
Interactive split-screen Markdown editor with live HTML preview and syntax rendering.
XML Formatter
Format, indent, and prettify XML documents and SOAP payloads with proper nesting.
XML Validator
Validate XML syntax, unclosed tags, and well-formedness according to W3C standards.
YAML Formatter
Format, validate, and clean YAML configuration files with 2-space indentation.
CSV to JSON
Convert CSV tabular data or spreadsheet text into structured JSON arrays and objects.
JSON to CSV
Convert JSON arrays and objects into downloadable CSV spreadsheet files.
Number Base Converter
Convert numbers between Binary (Base 2), Octal (Base 8), Decimal (Base 10), and Hexadecimal (Base 16).
ASCII Converter
Convert text characters to ASCII codes, binary bytes, hex, and decimal values.
HTML Entity Encoder
Convert special characters and symbols into HTML entities (&, <, >, ").
HTML Entity Decoder
Decode HTML entities and numerical character references back to plain text symbols.
Slug Generator
Generate clean, URL-friendly SEO slugs from titles, article headlines, and sentences.
Cron Expression Generator
Build crontab schedule expressions with an interactive time, day, and interval selector.
Cron Expression Parser
Parse cron expressions into human-readable English and calculate upcoming run dates.
Percentage Calculator
Calculate percentages, percentage increase/decrease, ratios, and discount math.
Age Calculator
Calculate exact age in years, months, days, hours, minutes, and days until next birthday.
Date Difference Calculator
Calculate the number of days, weeks, months, and business days between two dates.
Time Zone Converter
Convert date and time across global timezones (UTC, EST, PST, GMT, IST, JST).
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.
Remove Duplicate Lines
Deduplicate lines of text, sort alphabetically, and remove empty lines instantly.
Text Compare & Diff Checker
Compare two text documents or code snippets online. Free side-by-side visual diff tool with word-level change highlighting, line numbers, and privacy-first local processing.
CSV Compare & Diff Tool
Compare two CSV files or spreadsheet exports online. Highlight row additions, deletions, and changed cell values with visual tabular diff comparison.
SQL Compare & Query Diff Tool
Compare SQL queries, schema DDL scripts, table definitions, and migrations online. Highlights structural changes with SQL keyword syntax normalization.
Subnet / CIDR Calculator & IP Converter
Calculate IPv4 and IPv6 subnet ranges, network masks, CIDR notation, usable IP host ranges, and broadcast addresses online.
cURL to Code Converter
Convert cURL CLI commands into ready-to-run code in PHP (cURL/Guzzle), JavaScript (Fetch/Axios), Python (Requests), Go, C#, and Rust.
JSON to TypeScript Interface Generator
Generate clean TypeScript interfaces and type definitions from JSON data with nested objects, arrays, and optional fields.
SSL / TLS Certificate Decoder & Inspector
Decode X.509 PEM / CRT certificates online. Inspect Subject, Issuer CA, Expiration validity dates, SAN domains, and Public Key algorithms.
DNS Lookup & DoH Record Inspector
Perform DNS lookups online using DNS-over-HTTPS. Query A, AAAA, CNAME, MX, TXT, NS, and SOA records instantly.
Bcrypt & Argon2 Password Hash Generator
Generate and verify cryptographically secure Bcrypt and Argon2 password hashes online with custom cost factors.
JWT Signer & Signature Verifier
Sign, generate, and verify JSON Web Tokens (JWT) using HMAC (HS256/384/512) or RSA (RS256) keys online.
.htaccess to Nginx Rewrite Converter
Convert Apache .htaccess rewrite rules, redirects, and header directives into clean Nginx server and location blocks.
JSON to Go Struct (Golang) Converter
Convert JSON data into idiomatic Golang struct definitions with accurate json struct tags.
JSON to Python Pydantic Model Generator
Generate Python 3 Pydantic BaseModel schemas and dataclasses from JSON data for FastAPI and data validation.
JSON to SQL INSERT Generator
Convert JSON arrays and objects into bulk SQL INSERT INTO statements for MySQL, PostgreSQL, and SQLite.
SQL to JSON Converter
Convert SQL INSERT statements and table queries into structured JSON arrays and objects.
JSON to YAML Converter
Convert JSON objects and arrays to clean, readable YAML markup for Kubernetes, Docker, and CI/CD configs.
YAML to JSON Converter
Convert and validate YAML configurations into beautified or minified JSON.
XML to JSON Converter
Convert XML documents, SOAP responses, and RSS feeds into structured JSON objects.
JSON to XML Converter
Convert JSON data into clean, formatted XML with root element customizer.
Crontab / Cron Schedule Visualizer & Explainer
Translate crontab expressions into human-readable English and inspect the next 10 execution dates on a visual timeline.
Robots.txt & AI Bot Crawler Permissions Generator
Generate optimized robots.txt files with custom crawl rules for Googlebot, Bingbot, GPTBot, ClaudeBot, and PerplexityBot.
SVG to PNG / High-Res Rasterizer
Convert and render SVG vector code or files into high-resolution PNG, JPEG, and WebP images with scale customizer (1x, 2x, 4x).
CSS3 Mesh & Gradient Code Generator
Create beautiful linear, radial, conic, and multi-color mesh CSS gradients with visual live preview and 1-click CSS code copy.