DevUtils
The All-in-One Developer Toolkit for Your Daily Tasks
FreeHelpers301 impressions#629 of its week
Short Description
devUtils is a comprehensive, privacy-focused suite of essential developer tools wrapped in a clean, modern interface. From debugging JWTs to formatting JSON and converting timezones, devUtils handles the mundane so you can focus on the code.
Long Description
Every developer has a folder of bookmarks for random tools: one for JSON formatting, another for Base64 decoding, and yet another for checking JWT signatures. devUtils brings them all together in a single, polished application.
Built with a focus on privacy and speed, devUtils runs entirely in your browser—no data leaves your machine. Whether you're debugging a tricky authentication flow or just need to pretty-print some API responses, devUtils provides a seamless, distraction-free experience.
Key Features
🔒 Encoders & Decoders- JWT Decoder: Decode headers and payloads, verify signatures (HS256, RS256, etc.), and debug tokens instantly.
- Base64: Encode and decode text and files with ease.
- URL & HTML: Quickly encode or decode special characters for safe transmission.
- JSON: Validate, format, and minify JSON data.
- HTML & CSS: Prettify your markup and stylesheets for better readability.
- Number Base: Convert between Binary, Octal, Decimal, and Hexadecimal. Supports bulk conversion.
- Epoch Time: Convert Unix timestamps to human-readable dates and vice versa.
More Helpers tools →74 free dev tools →
devUtils is a privacy-focused, in-browser suite of encoders, decoders, formatters and converters for everyday developer tasks.
- for
- Web developers who need quick, offline tools for data transformation and validation.
Key features
- JWT Decoder — Decode JWT headers and payloads, verify signatures (HS256, RS256, etc.) instantly.
- Base64 Encoder/Decoder — Encode and decode text or files to/from Base64 directly in the browser.
- JSON Formatter & Validator — Validate, pretty-print, and minify JSON data for easier reading.
- HTML & CSS Prettifier — Beautify markup and stylesheet code for better readability.
- Number Base Converter — Convert numbers between binary, octal, decimal and hexadecimal, with bulk support.
- Epoch Time Converter — Transform Unix timestamps to human-readable dates and back.
- URL & HTML Encoder/Decoder — Encode or decode special characters for safe transmission in URLs or HTML.
Use cases
- Debugging authentication flows by inspecting JWT tokens.
- Pretty-printing API responses formatted as JSON.
- Converting timestamps from logs into readable dates.
- Encoding data for safe inclusion in URLs or HTML pages.
- Bulk converting numbers between different bases for scripting.
DevUtils vs alternatives
 DevUtils |  String Utility Belt |  Webacus | ||
|---|---|---|---|---|
| Best for | All-in-one browser-based dev utilities | Customizable text transformation pipelines | Curated collection of free dev tools | General web-dev toolbox |
| Pricing | Free | Free | One time fee | Free |
| DevHunt upvotes | 0 | 26 | 12 | 26 |
| Launched | Jan 2026 | Oct 2026 | Jan 2023 | Nov 2024 |
- DevUtils vs String Utility Belt: String Utility Belt is an open-source library for building custom text pipelines, while devUtils offers ready-made UI tools.
- DevUtils vs Damn Good Tools: Damn Good Tools is a curated list of free utilities; devUtils bundles specific encoders/formatters in one app.
- DevUtils vs Webacus: Webacus is a Swiss-army-knife for web development with broader features; devUtils focuses on data encoding/formatting.
DevUtils FAQ
Does any data leave my machine when using devUtils?+
No. devUtils runs entirely in the browser, so no data is sent to external servers.
Can I use devUtils offline?+
Yes. Because it is a client-side application, it works without an internet connection after the page loads.
What token algorithms does the JWT decoder support?+
It can decode and verify signatures for common algorithms such as HS256 and RS256.
Is there a limit to the size of files I can encode/decode with Base64?+
The tool operates in the browser, so limits depend on the browser’s memory constraints.
Does devUtils provide any API or command-line interface?+
No. It is a web-based UI tool only.
Summarized by DevHunt from devutils.me · Oct 22, 2026. Details may change; check the official site.
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