DevToolbox

Browser-based developer utilities for formatting data, encoding strings, generating test values, and inspecting web-related input. The tools are designed for quick checks during development without requiring a database or account sign-in.

What You Can Do Here

Use DevToolbox when you need a fast workspace for common developer tasks: formatting JSON or XML, converting query strings, generating UUIDs and passwords, checking HTTP status codes, inspecting user agents, or creating dummy files for upload tests. Each tool runs as a focused page with a clear input area, output area, and reference notes.

Privacy and Processing

Most transformations happen directly in the browser. The site does not use a database for saved user data, and generated values such as passwords, UUIDs, formatted snippets, and dummy text are intended to stay in the current session. Avoid pasting production secrets unless you have reviewed your browser, extension, and network environment.

Tool Categories

🔐

Encoding

5 tools for encoding workflows.

Base64 Encode Decode Encode text to Base64 or decode Base64 strings back to UTF-8 text. URL-safe Base64 is supported.
URL Encode Decode Percent-encode URL strings or decode percent-encoded text back to readable form.
HTML Entities Escape HTML special characters or unescape HTML entity strings.
Decode Detector Guess whether a string looks like Base64, URL encoding, hashes, JWT, ASCII, hex, or HTML entities.
JWT Encode Decode Create JWTs or decode JWT header and payload and inspect common claims.

#️⃣

Hashing

2 tools for hashing workflows.

MD5 Hash Compute the MD5 hash of input text.
SHA Hash Compute SHA-1, SHA-256, SHA-384, and SHA-512 digests.

📋

Format

3 tools for format workflows.

JSON Beautify Format, minify, validate, and sort JSON.
XML Formatter Pretty-print, minify, and validate XML documents.
SQL Formatter Format SQL queries with line breaks and indentation.

🔄

Convert

6 tools for convert workflows.

PHP Serialize Convert between JSON and PHP serialize() strings.
Unix Timestamp Convert Unix timestamps to dates and dates back to timestamps.
Cron Parser Parse five-field cron expressions and preview upcoming run times.
Data Size Convert B, KB, MB, GB, and TB using a 1024 base.
Query String JSON Converter Convert URL query strings to JSON and JSON objects back to query strings.
CSV JSON Converter Convert CSV with headers to JSON arrays and JSON arrays back to CSV.

🔤

String

10 tools for string workflows.

Case Converter Convert text to camelCase, snake_case, kebab-case, and more.
String Inspector Analyze string length, bytes, lines, and character properties.
Character Counter Count characters, words, lines, and bytes.
Text / IP Sorter Sort lines by alphabet, number, IP address, or length.
Symbols Copy frequently used Unicode symbols and special characters.
UUID Generator Generate random UUID v4 identifiers in the browser.
Password Generator Generate random passwords with length, count, and character set options.
Regex Tester Test JavaScript regular expressions against sample text.
Diff Checker Compare two text blocks and highlight added and removed lines.
Color Converter Convert HEX colors to RGB and HSL with a live swatch.

🌐

Web

4 tools for web workflows.

Domain Punycode Convert Unicode domain names to Punycode xn-- form.
User Agent Parser Analyze browser User-Agent strings.
HTTP Status Code Look up common HTTP status codes and meanings.
MIME Type Lookup Find MIME types from extensions or extensions from MIME types.

▣

Dummy

3 tools for dummy workflows.

Dummy Image Generate PNG dummy images with custom size, color, text, and download size.
Dummy PDF Generate a simple dummy PDF with a selected number of pages.
Dummy Text Generate lorem ipsum dummy text by paragraphs, sentences, or words.

How to Read Tool Pages

Every tool page includes a short description, a working input/output interface, and an expanded guide at the bottom. The guide explains what the tool does, when to use it, an input/output example, and practical limitations so the page has useful reference content even before you enter data.