Online Developer Tools
Browse 83 active tools. Explore a category or search for the task you need. All tool processing runs locally in your browser.
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JSON Formatter
Format, beautify, validate, minify and pretty print JSON online. Fix common syntax issues, inspect tree view and keep your data private in-browser.
JSON Minifier
Minify JSON online by removing whitespace and line breaks. See exact bytes saved, validate syntax and copy compact JSON without uploading your data.
JSON Validator
Validate JSON syntax online and find exact parse errors by line and position. Check JSON, lint common mistakes and keep all data in your browser.
JSON Viewer
View JSON online in a searchable collapsible tree. Explore nested objects and arrays, format raw JSON and inspect large payloads privately in your browser.
JSON Parser
Parse JSON online, inspect values and catch syntax errors with clear line and column details. Understand parsed types and structure without server uploads.
JSON Editor
Edit JSON online with live validation, formatting and tree view. Fix syntax, search nested data and copy or download clean JSON entirely in your browser.
JSON to TOON Converter
Convert JSON to TOON for compact LLM prompts. Reduce repeated keys in tabular data, compare token counts and keep conversion entirely in your browser.
JSON to CSV
Convert JSON arrays to CSV online. Flatten nested objects, create spreadsheet-ready rows and copy or download CSV privately in your browser.
CSV to JSON
Convert CSV to a JSON array online with quoted-field and custom-delimiter support. Preview structured output and process files entirely in your browser.
JSON to YAML
Convert JSON to clean YAML online for Kubernetes, Docker and CI configs. Preserve nested objects and arrays with private browser-side conversion.
YAML to JSON
Convert YAML to JSON online with support for nested maps and lists. Validate config structure and get clean JSON without uploading your data.
JSON to XML
Convert JSON to XML online with configurable root and item tags. Preserve nesting, preview valid XML and keep all processing in your browser.
XML to JSON
Convert XML to JSON online while preserving attributes, nested elements and repeated nodes. Preview clean JSON with private in-browser processing.
JSON to SQL
Convert JSON to SQL INSERT statements and CREATE TABLE schemas online. Map object fields to columns and generate database-ready SQL in your browser.
JSON to Excel
Convert JSON to a real Excel XLSX file online. Flatten structured data into rows, preserve useful types and download the workbook from your browser.
JSON to TypeScript
Generate TypeScript interfaces and type definitions from JSON online. Infer nested object, array and primitive types from sample API responses.
JSON to GraphQL
Generate GraphQL type definitions from sample JSON online. Infer nested object, list and scalar fields to speed up schema prototyping.
JSON to HTML Table
Convert JSON arrays into clean HTML table markup online. Preview rows and columns, copy table code and keep source data in your browser.
JSON to Markdown Table
Convert JSON arrays to Markdown tables for GitHub, READMEs, wikis and docs. Generate clean pipe-table output instantly in your browser.
JSON Schema Validator
Validate JSON against JSON Schema draft-07 online or generate a starter schema from sample data. See clear validation errors in your browser.
JSON Diff & Compare
Compare two JSON documents online and highlight added, removed and changed values. Semantic comparison ignores key order and runs in your browser.
JSONPath Tester
Test JSONPath expressions against JSON online and see matching values instantly. Explore paths, filters and nested data with live browser-side results.
Binary to Decimal
Convert binary to decimal instantly with step-by-step place values and examples. Supports common binary inputs and runs entirely in your browser.
Decimal to Binary
Convert decimal integers to binary online with optional bit grouping, worked examples and a quick reference chart. Everything runs in your browser.
Hex to Decimal
Convert hexadecimal to decimal instantly. Accepts 0x prefixes, uppercase or lowercase hex and shows base-conversion examples in your browser.
Decimal to Hex
Convert decimal integers to hexadecimal online and copy uppercase hex or 0x-prefixed output. Includes examples and base references.
Binary to Hex
Convert binary numbers to hexadecimal instantly with 4-bit grouping and decimal or octal references. Private browser-side conversion.
Hex to Binary
Convert hexadecimal to binary online with optional 4-bit grouping. Accept 0x-prefixed values and copy clean binary output instantly.
Decimal to Octal
Convert decimal integers to octal base-8 online with step-by-step division examples and related base conversions.
Octal to Decimal
Convert octal base-8 numbers to decimal online using place values. Get instant results, examples and related base conversions.
Binary to Octal
Convert binary to octal instantly by grouping bits into sets of three. Includes worked examples and cross-base references.
Octal to Binary
Convert octal digits to binary online with 3-bit expansion and optional grouping. Instant client-side conversion with examples.
Hex to Octal
Convert hexadecimal to octal online through exact base conversion. Accept 0x input and see related binary and decimal values.
Octal to Hex
Convert octal base-8 numbers to hexadecimal online. Get instant hex output plus binary and decimal references in your browser.
Number to Words
Convert numbers to English words online, including large and negative values. Copy readable number text instantly with private browser-side processing.
Text to Binary
Convert text to binary code online using UTF-8 bytes. See 8-bit groups, copy binary output and reverse the conversion with the related translator.
Binary Translator
Translate binary code to readable text online and switch to text-to-binary when needed. Decode 8-bit bytes instantly with private browser-side processing.
Text to Hex
Convert text and Unicode characters to hexadecimal UTF-8 bytes online. Copy spaced or compact hex output instantly in your browser.
Hex to Text
Decode hexadecimal bytes to readable UTF-8 text online. Accept spaced or compact hex input and keep all conversion in your browser.
Bitwise Calculator
Calculate bitwise AND, OR, XOR, NAND, NOR, XNOR, NOT and shifts online. View results in binary, decimal and hex instantly.
Random Number Generator
Generate one or many random numbers in any range. Choose unique values, sort results and use quick 1–10 or 1–100 presets instantly online.
Number Sorter
Sort a list of numbers ascending or descending online. See count, sum, minimum, maximum and average automatically in your browser.
Base64 Encode
Encode text and Unicode strings to Base64 online. Copy standard Base64 output instantly and keep every character private with client-side processing.
Base64 Decode
Decode Base64 to readable text online, including standard and URL-safe strings. Handle Unicode safely and keep encoded data private in your browser.
JSON to Base64
Encode JSON to Base64 online after validating the input. Create compact transport-safe strings for URLs, tokens and configs entirely in your browser.
Base64 to JSON
Decode Base64 strings into readable JSON online. Validate and pretty print decoded objects for JWT payloads and API data in your browser.
URL Encode
URL-encode text and query values online with percent encoding. Safely encode spaces, Unicode and reserved characters using browser-side processing.
URL Decode
Decode percent-encoded URLs and query strings online. Convert %20, %2F and Unicode escape sequences back to readable text instantly.
JWT Decoder
Decode JWT tokens online to inspect header, payload, claims and expiration times. No token is uploaded; decoding happens entirely in your browser.
HTML Encode
Encode special characters into safe HTML entities online. Escape angle brackets, ampersands, quotes and Unicode text in your browser.
HTML Decode
Decode HTML entities into their original characters online. Convert named and numeric entities such as & and ' in your browser.
Image to Base64
Convert images to Base64 data URIs online or decode Base64 back to an image. Preview output locally without uploading image files.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes online with optional HMAC. Compare algorithms and copy hex or Base64 output.
SHA-256 Generator
Generate SHA-256 hashes from text online. Copy 256-bit output in hex or Base64 and keep input private with browser-side hashing.
SHA-512 Generator
Generate SHA-512 hashes from text online. Create 512-bit digests in hex or Base64 with private browser-side processing.
SHA-1 Generator
Generate SHA-1 hashes online for legacy checksums and compatibility. Understand SHA-1 security limitations and keep input in your browser.
MD5 Generator
Generate MD5 hashes online for checksums and legacy compatibility. Copy 32-character hex output and learn why MD5 is not secure for passwords.
UUID Generator
Generate secure random UUID v4 values and GUIDs online. Create one or many IDs, choose case and copy results instantly from your browser.
Unix Timestamp Converter
Convert Unix timestamps and epoch time to readable dates and back. Switch seconds or milliseconds, UTC or local time, with a live Unix clock.
Case Converter
Convert text between uppercase, lowercase, Title Case, camelCase, PascalCase, snake_case and kebab-case instantly in your browser.
Color Picker & Converter
Pick colors visually and convert between HEX, RGB and HSL online. Adjust sliders, preview colors and copy CSS-ready values instantly.
HEX to RGB
Convert HEX color codes to RGB values online. Supports 3- and 6-digit hex, optional alpha and instant CSS-ready output.
RGB to HEX
Convert RGB color values to HEX codes online. Validate 0–255 channels, preview the color and copy CSS-ready hex output instantly.
Password Generator
Generate strong random passwords online with configurable length, numbers, symbols and character sets. Uses browser crypto and never sends passwords away.
QR Code Generator
Create free QR codes from URLs or text online. Customize size, colors and error correction, then download PNG or SVG without uploading your data.
Word & Character Counter
Count words, characters, sentences and reading time instantly. Check character count, keyword density and text length privately in your browser.
Markdown to HTML
Convert Markdown to clean HTML online with a live preview. Supports common GitHub-flavored Markdown features and keeps document content in your browser.
Text Diff Checker
Compare two blocks of text online and highlight added, removed and changed lines. Review differences instantly without uploading either document.
Cron Expression Generator
Build cron expressions online, use common presets and translate schedules into plain English. Preview timing before adding jobs to your system.
Slug Generator
Turn titles and text into clean URL slugs online. Choose hyphens or underscores, lowercase output and remove unsafe characters instantly.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text by paragraphs, sentences or words. Copy clean dummy text instantly for layouts, wireframes and design mockups.
Barcode Generator
Generate Code 128, EAN-13, UPC-A, Code 39 and other barcodes online. Customize size and download clean barcode images directly from your browser.
XML Formatter
Format and beautify XML online with readable indentation, syntax checking and copy/download tools. Keep XML documents private with browser-side processing.
Regex Tester
Test regular expressions online against sample text. Highlight matches, groups and flags instantly with a private browser-based regex testing tool.
SQL Formatter
Format and beautify SQL queries online with readable indentation and keyword casing. Clean up SELECT, INSERT, UPDATE and CREATE statements in your browser.
HTML Formatter
Format and beautify HTML online with clean indentation and readable nested markup. Paste HTML, format it instantly and keep source code in your browser.
Markdown Editor
Write Markdown online with live preview and generated HTML. Edit headings, lists, tables and code blocks privately in your browser.
URL Parser
Parse a URL into its protocol, host, path, query parameters, fragment and credentials. Inspect and copy URL components locally in your browser.
Query String Parser & Builder
Parse query strings into editable key and value rows, preserve repeated parameters, and build encoded URL parameters locally with URLSearchParams.
HTTP Header Parser
Parse pasted HTTP request or response headers into readable name and value rows. Preserve duplicate fields and inspect common headers locally.
HTTP Status Code Lookup
Search standard HTTP status codes by number, phrase or class. Find concise meanings for informational, success, redirect and error responses.
MIME Type Lookup
Look up common file extensions, MIME types and content categories. Find local reference entries for JSON, SVG, WebP, PDF, CSV, XML and more.
IP Subnet Calculator
Calculate IPv4 network and broadcast addresses, masks, host ranges and address counts from an IP and CIDR prefix. Includes /31 and /32 handling.
Explore by category
Find a place to startJSON Tools
22 toolsInspect API responses, validate syntax, compare documents and convert structured data into formats your workflow needs.
Encoding & Decoding Tools
10 toolsEncode text for transport and inspect Base64, URLs, JWT claims, HTML entities and image data URIs.
Number Converter Tools
21 toolsConvert binary, decimal, hexadecimal and octal values, translate encoded text and work with number lists.
Hash Tools
5 toolsCalculate text digests, compare hash algorithms and generate keyed HMAC values locally.
Text & Web Tools
11 toolsCount words and characters, compare text, test regular expressions, format XML, SQL and HTML, and write Markdown.
Color Tools
3 toolsChoose a color visually, convert HEX, RGB and HSL values, and copy CSS-ready output.
Generators
7 toolsCreate passwords, UUIDs, barcodes, static QR codes, random numbers, cron expressions and placeholder text.
HTTP & Network Tools
6 toolsParse URLs and HTTP headers, inspect status codes and MIME types, and calculate IPv4 subnet information directly in your browser.