What it does
DevToys bundles small utilities for everyday development work in a desktop application, with a separate companion command-line app. Its listed tools include JSON and YAML conversion, Base64 encoding and decoding, JWT handling, text comparison, hash generation, formatters, and testers. Smart Detection can suggest a tool from clipboard content, while an extension SDK lets developers add tools. It is useful when a quick local transformation is more appropriate than pasting a snippet into an unrelated web utility.
DevToys is aimed at small, focused tasks rather than replacing an editor or a full test suite. The official product page lists 30 default offline tools, including JSON-to-YAML conversion, Base64 text and image conversion, JWT encoding and decoding, text comparison, hash generation, formatters, and JSONPath or regular-expression testers.
Try a focused transformation
For example, when you need to move a short JSON object into a YAML configuration file, use the JSON/YAML converter and review the resulting text before adding it to a project. The product also describes Smart Detection: it can suggest a compatible tool for clipboard content, and when it finds one match it can paste that content into the tool automatically. The site says this behavior can be customized in settings. This is a documented example, not a test of the application.
The product is available as a desktop app for Windows, macOS, and Linux. Its download page lists installers and portable packages for supported systems. If you want scripted use, the separate DevToys CLI is another download; the product site says most tools that make sense on the command line are available there, so do not assume the GUI and CLI have identical coverage. The repository publishes the project under the MIT License. Developers who need a missing utility can also consult the 2.0 extension SDK documentation, which covers creating, debugging, and publishing extensions.
Strengths
- Groups conversions, encoders, formatters, text utilities, and small data testers in one desktop app.
- The default tool set is described as offline, and Smart Detection can suggest a tool based on clipboard content.
- A documented extension SDK gives developers a route to add tools beyond the defaults.
Watch out for
- The CLI is a separate application and exposes only the tools that make sense for command-line use, not a guaranteed one-to-one version of the GUI.
Best for
- Converting short JSON and YAML snippets while editing configuration
- Encoding, decoding, hashing, or comparing text without using a separate web utility
- Developers who want a local toolkit they can extend
Sources
- DevToys (Oct 25, 2026)
- Download DevToys and DevToys CLI (Oct 25, 2026)
- Introduction | DevToys (Oct 25, 2026)
- DevToys official repository (Oct 25, 2026)
- DevToys MIT License (Oct 25, 2026)