Developer's Arsenal
Discover, use, and collect efficient tools designed for developers to enhance your development efficiency.
About Devtool.tech
Devtool.tech (Developer's Arsenal) is a free, browser-based toolbox for software engineers, students, and technical writers. It bundles encoding and hashing utilities, JSON and data-format converters, color pickers and accessibility checkers, image compressors, JWT debuggers, Markdown and table transformers, and interactive playgrounds for regex and React—over sixty tools in one place, with no account required.
Every tool runs locally in your browser: your inputs are not uploaded to our servers, which makes the site suitable for tokens, configs, and personal data during day-to-day debugging, API integration, documentation, and learning.
Browse by category below or open a topic page for curated collections (Markdown, encoding, JWT, color, tables, images, and general dev utilities). Each link goes directly to a tool page; search and favorites are available when JavaScript is enabled.
Tool Topics
HTML to Markdown, directory trees, table conversion, and batch URL processing.
Base64, URL encoding, hash generation, and UTF-8 charset conversion.
Decode and encode tokens, and check timestamps.
Convert colors, check contrast, build palettes, and explore OKLCH.
Convert and generate CSV, JSON, Markdown, HTML, Excel, and more.
Compress, remove backgrounds, watermark, read EXIF, and convert formats.
UUIDs, timestamps, passwords, hashes, ASCII codes, and IP lookup.
Code
Developer's Arsenal - Online code playground supporting React, regex, and more for real-time testing.
Color Tools
Developer's Arsenal - Online color tools including color converter, palette generator, contrast checker, color blindness simulator, and more.
Interview Guide
Index.categoryDescription_interview
Developer Tools
Developer's Arsenal - Online developer tools including JWT decoder, UUID generator, User-Agent parser, and more.
Image
Developer's Arsenal - Online image processing tools including compression, format conversion, watermarking, and EXIF viewer.
Encoding and Hashing
Developer's Arsenal - Online encoding and hashing tools including Base64, URL encoding, MD5/SHA hashing, and more.
Convert
Developer's Arsenal - Online format conversion tools including number base converter, timestamp converter, JSON/CSV converter, and more.
Table
Developer's Arsenal - Online table tools supporting conversion between Markdown tables, CSV, JSON, and more formats.
