Tool
61 tools
JWT Generator and Verifier
Generate JWT tokens online and verify signatures for auth debugging, API testing, and local development.
JSON β TOON Converter
Convert JSON payloads to Token-Oriented Object Notation (TOON) and back instantly for LLM-friendly prompts.
JSONPath Tester
Run JSONPath queries online to extract nested fields and array items from JSON. Supports filters, recursive descent, and slices.
JSON Diff
Compare two JSON documents side by side and spot added, removed, and changed paths fast.
JSON Schema Validator
Validate JSON against JSON Schema online and pinpoint missing fields, type mismatches, and rule violations fast.
Number to Chinese
Convert Arabic numerals to Chinese characters, supports simplified and traditional
CSV to HTML Table
Convert CSV data into clean HTML tables with delimiter detection, header control, and preview.
Excel to JSON
Convert Excel files (XLSX, XLS, CSV) to JSON format with drag-and-drop upload and multiple output options
JSON and CSV Converter
Convert JSON and CSV in both directions online with custom delimiters, header controls, and downloadable output.
Reverse String
String reversal and text processing tool
QR Code Generator
Online QR code generation tool, supports text, URL and other content
Batch QR Code Generator
Generate multiple QR codes in one go and export them as a ZIP package for campaigns, packaging or offline events.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text as paragraphs, sentences, words, or lists.
Morse Code Converter
Morse code encoding and decoding tool with audio playback, download and screen flash
WebSocket Tester
Online WebSocket client for connecting, sending messages and inspecting responses in real time
cURL Request Builder
Build and run HTTP requests while generating reusable cURL commands.
cURL to PHP Online Converter
Transform raw curl commands into ready-to-use PHP code powered by curlconverter.
cURL to Go Online Converter
Convert raw curl commands into idiomatic Go HTTP client code using curlconverter.
cURL to Java Online Converter
Turn curl commands into Java HTTP client code with curlconverter, supporting HttpClient, HttpUrlConnection, OkHttp, and Jsoup.
cURL to Python Online Converter
Convert curl commands into Python HTTP client code powered by curlconverter, supporting both requests and http.client styles.
Color Picker
Professional color selection and management tool with format conversion, palette generation, and contrast analysis
CSS Gradient Generator
Online CSS gradient generator with support for linear, radial and conic gradients, featuring real-time preview and multiple presets
Box Shadow Generator
Generate CSS box-shadow code with visual controls, supports inset/outset, opacity and live preview
Decimal to Fraction Converter
Convert decimals to simplified fractions with step-by-step reduction and a clean mixed-number view.
Remove Space
Remove spaces from text, including spaces, tabs and newline characters
English Case Converter Tool
Simple and practical text formatting utility focused on basic English letter case conversion, supporting uppercase, lowercase, capitalize and sentence case
Kebab Case Converter Tool
Professional kebab-case converter tool supporting bidirectional conversion with other naming formats
Constant Case Converter Tool
Professional CONSTANT_CASE converter tool supporting bidirectional conversion with other naming formats
HTML Tag Remover
Strip HTML tags, scripts, and inline styles to get clean plain text
PX to PT Converter
Convert between pixels (PX) and points (PT) units with custom DPI settings
PX to REM Converter
Convert between pixels (PX) and rem units with custom base font size
PX to EM Converter
Convert between pixels (PX) and em units with custom context font size
Crontab Expression Parser
Linux standard Crontab expression parsing and testing tool, supports standard 5-field cron expression format
Cron Expression Generator
Visual Cron expression generator tool that supports generating standard 5-field Linux scheduled task expressions through interface configuration
Password Generator
Secure password generation tool with customizable length and character types
Coin Flip Simulator
Flip a virtual coin, run fast simulations and track fairness with live stats.
Pomodoro Timer
Pomodoro focus timer with work/break cycles, presets, daily goal tracking, and session progress.
Online Flashlight / Screen Night Light
Turn your computer screen into a pure white or warm night light with fullscreen mode, brightness control, wake lock, and soft color presets.
Multi-language Locale Converter
Format numbers, currency, date/time, and unit conversion across locales in one place.
Query Builder
Manage query params as key/value rows and generate query strings or full URLs in real time.
URL Parser / Query Params Extractor
Parse full URLs or raw query strings online and extract parameters, core URL parts, and a copyable JSON result.
Text Statistics Tool
Comprehensive text character statistics tool, supporting detailed analysis of character count, word count, numbers, Chinese and English punctuation
BMI Calculator
Professional BMI (Body Mass Index) calculation tool with multiple unit conversions, healthy weight range and detailed analysis
Calorie & Macro Calculator
Estimate your daily calories and macronutrient targets based on age, body data, activity level and fitness goal.
Math Expression Calculator
Powerful online mathematical expression calculator supporting basic operations, trigonometric functions, logarithms, exponentials and complex mathematical calculations
Online Base Converter Tool
Powerful online base converter tool supporting conversion between binary, octal, decimal, hexadecimal and other number systems
IP Subnet Calculator
Calculate IPv4 subnet information online, including network address, broadcast address, subnet mask, usable host range, etc.
SVG Online Preview
Online SVG code preview and editor with real-time rendering, syntax highlighting and download features
Image Resize Tool
Online image resizing tool with support for proportional scaling, custom dimensions, quality compression and more
GIF Resize Tool
Resize animated GIFs entirely in the browser while keeping every frame intact. Supports proportional scaling, custom dimensions and adjustable encoding quality.
Image Compressor
Reduce image file size in the browser with adjustable quality, optional resizing and format conversion. No uploads required.
Image Format Converter (PNG JPG WebP AVIF)
Convert images between PNG, JPG, WebP and AVIF directly in your browser with optional transparency and quality controls.
Image Round Corners
Add rounded corners to images with customizable radius and background color
Metronome
Professional online metronome with multiple time signatures, sound types and tempo settings
Pitch Frequency Converter
Convert between musical notes and frequencies with audio playback and reference tables
Markdown HTML Converter
Online Markdown to HTML converter with real-time preview, syntax highlighting and bidirectional conversion
Regular Expression Tester
Interactive regular expression tester with live highlighting, capture group inspection, and flag controls.
Regex Replace
Replace text with regular expressions online, with replacement templates, capture group references, named groups, and flag controls.
Add Line Numbers Tool
Automatically add line numbers to pasted text with configurable start, step, and alignment.
Arithmetic Sequence Generator
Generate an arithmetic sequence from the first term, common difference, and count, with an optional nth-term calculator.
HTTP Request Tool
Send HTTP requests and view responses, similar to Postman