Reconnecting… Connection lost. Reload Session expired. Reload

Free developer tools, ready when you are.

45 tools for everyday developer tasks — format JSON, decode JWTs, generate QR codes, test regex, extract image colours, convert Base64, and more. No sign-up, no tracking, no data sent to any server.

No login required
No data stored
Works in your browser
Free forever

Developer Tools

JSON Formatter

Format and validate JSON with consistent indentation.

Open tool

Developer Tools

JSON to C# Model Converter

Generate starter C# models from JSON payloads.

Open tool

Developer Tools

Regex Tester

Test patterns against sample input and inspect matches.

Open tool

Developer Tools

JWT Decoder

Decode JWT header and payload data instantly.

Open tool

Developer Tools

JWT Generator

Build and sign JWT tokens with HS256, HS384 or HS512.

Open tool

Developer Tools

JWT Secret Generator

Generate cryptographically secure signing secrets for JWT.

Open tool

Developer Tools

Password Generator

Generate strong passwords with configurable rules.

Open tool

Developer Tools

Text Compare

Compare two text blocks and inspect their differences.

Open tool

Developer Tools

Markdown Preview

Preview Markdown as clean rendered HTML.

Open tool

Developer Tools

SQL Formatter

Format SQL queries for better readability.

Open tool

Developer Tools

YAML Formatter

Format and validate YAML with consistent indentation.

Open tool

Developer Tools

HTML Formatter

Prettify and indent HTML markup for readability.

Open tool

Developer Tools

Base64 Encoder / Decoder

Encode or decode Base64 content quickly.

Open tool

Developer Tools

UUID Generator

Generate one or more UUID values.

Open tool

Developer Utilities

Timestamp Converter

Convert Unix timestamps and UTC dates.

Open tool

Developer Utilities

JSON Diff Tool

Compare JSON documents and inspect changes.

Open tool

Developer Utilities

CSV ↔ JSON Converter

Convert between CSV and JSON formats instantly.

Open tool

Developer Utilities

HTML Minifier

Minify HTML output for leaner payloads.

Open tool

Developer Utilities

CSS Minifier

Minify CSS while preserving valid rules.

Open tool

Developer Utilities

Image to Base64

Convert image data to Base64.

Open tool

Developer Utilities

Base64 to Image

Decode Base64 into image-ready data.

Open tool

Developer Utilities

SVG to PNG Converter

Convert SVG markup to a PNG image at any scale. Runs entirely in your browser.

Open tool

Developer Utilities

PNG to SVG Converter

Wrap a raster image (PNG, JPG, WebP) inside an SVG container for use in vector workflows.

Open tool

Developer Utilities

Cron Expression Generator

Generate and explain cron expressions.

Open tool

Developer Utilities

Color Picker + Converter

Convert HEX, RGB, and HSL values.

Open tool

Developer Utilities

Color Picker from Image

Extract dominant colors from any uploaded image as HEX and RGB swatches.

Open tool

Developer Utilities

URL Encoder / Decoder

Encode or decode URL-encoded strings instantly.

Open tool

Developer Utilities

HTML Entity Encoder / Decoder

Encode or decode HTML entities with a single click.

Open tool

Developer Utilities

String Escape / Unescape

Escape or unescape strings for JSON, HTML, URL, C#, Regex and XML.

Open tool

Developer Utilities

Hash Generator

Generate MD5, SHA1, SHA256 and SHA512 hashes.

Open tool

Developer Utilities

Number Base Converter

Convert numbers between binary, octal, decimal and hex.

Open tool

Developer Utilities

Text Case Converter

Convert text between camelCase, PascalCase, snake_case and kebab-case.

Open tool

Developer Utilities

Word & Character Counter

Count words, characters, lines and sentences.

Open tool

Developer Utilities

Lorem Ipsum Generator

Generate placeholder lorem ipsum text for any layout.

Open tool

Developer Utilities

QR Code Generator

Generate a QR code from any URL or text.

Open tool

Developer Utilities

Barcode Generator

Generate 1D barcodes in Code128, EAN-13, EAN-8, UPC-A and Code39 formats.

Open tool

Developer Utilities

URL Parser

Break a URL into scheme, host, path and query parameters.

Open tool

Developer Utilities

Unix Permissions Calculator

Convert between octal notation and symbolic permissions.

Open tool

Developer Tools

CSS Formatter

Beautify and reformat minified or messy CSS stylesheets.

Open tool

Developer Tools

XML Formatter

Format and validate XML with consistent indentation.

Open tool

Developer Tools

JSON to TypeScript

Generate TypeScript interfaces from any JSON payload instantly.

Open tool

Developer Utilities

.gitignore Generator

Generate .gitignore files for any language, framework or IDE.

Open tool

Developer Utilities

IP / CIDR Subnet Calculator

Calculate network address, broadcast, host range and subnet mask from any CIDR block.

Open tool

Developer Utilities

Fake Data Generator

Generate realistic mock JSON or CSV records for testing and prototyping.

Open tool

Developer Utilities

Image to Text (OCR)

Extract text from any image using Tesseract OCR — runs entirely in your browser.

Open tool
From the developer blog

Practical guides on the formats and tools every developer works with.

15 May 2026 · 6 min read
What is JSON? A Complete Guide to Formatting and Validation

Learn what JSON is, how to format it correctly, validate it, spot common mistakes, and why it became the universal data exchange format.

01 May 2026 · 5 min read
How QR Codes Work: Types, Error Correction, and Generation Guide

Understand QR code structure, data capacity, error correction levels, and how to generate the right QR code for any use case.

15 Apr 2026 · 7 min read
JWT Tokens Explained: Header, Payload, Signature and Security

A practical guide to JSON Web Tokens — how they are structured, signed, decoded, and when to use them over session cookies.

View all articles →

About DevToolsHub

DevToolsHub is a free collection of browser-based developer utilities built for developers who want fast, no-fuss tools without signing up, installing software, or pasting sensitive data into unknown third-party services. Every tool on the site either runs entirely in your browser or sends your input to a dedicated API over HTTPS and discards it immediately after returning the result — nothing is logged, stored, or associated with your identity.

The site covers the tools developers reach for dozens of times a week: formatters for JSON, SQL, YAML, HTML, CSS, and XML; encoders and decoders for Base64, URLs, and HTML entities; generators for UUIDs, passwords, QR codes, cron expressions, and .gitignore files; converters for timestamps, number bases, CSV/JSON, and text case; and testing tools for regex patterns, text diffs, and JWT tokens. New tools are added regularly based on feedback from the developer community.

DevToolsHub is built with ASP.NET Core 8, Blazor Server, and MudBlazor, and hosted on Microsoft Azure. The site is designed to load fast, work on any screen size, and stay out of your way — no modal dialogs, no cookie banners on first load, no upsell prompts. The blog covers practical guides on the formats and protocols the tools work with: what Base64 actually is, how JWT tokens are structured, what makes a cron expression tick, and more.

DevToolsHub was built and is maintained by Pankaj Kumar, a software developer based in India. If you find a bug, want to request a tool, or have feedback, use the contact page or email [email protected].

Why DevToolsHub?

  • No login or account required for any tool
  • No data stored — inputs are processed and discarded
  • All 45 tools in one place, no switching between sites
  • Works on desktop, tablet, and mobile
  • Dark and light mode with accent colour choices
  • Completely free, no premium tier
  • New tools added based on community requests
✉
Feedback or suggestions?

Found a bug or have an idea for a new tool? Drop me an email.

[email protected]
☕
Find the tools useful?

Everything here is free. If it saves you time, a coffee keeps it running.

Buy me a coffee
About · Blog · Contact · Write for us · Privacy Policy · Terms of Service · © 2026 DevToolsHub · Built by Pankaj Kumar
An unhandled error has occurred. Reload x