Developer tools
Guides to individual tools in DevT Pro: what each one does, when it is useful, and why everything runs locally on your device instead of in a browser.
JSON Formatter
Format, beautify and validate JSON locally, with no uploads, no account and no internet connection.
JSON to YAML
Convert JSON into clean, readable YAML for config files, CI pipelines and Kubernetes manifests.
cURL to Python
Turn cURL commands into Python requests code you can paste straight into a script or test.
Regex Tester
Test and debug regular expressions with live match highlighting and instant feedback.
JWT Decoder
Decode JWT headers and payloads locally before pasting a token into any web tool.
Base64 Decoder
Decode Base64 back into readable text without sending encoded payloads to an online service.
URL Encoder
Encode and decode text for URLs, including reserved characters and query parameters.
Timestamp Converter
Convert Unix timestamps to human-readable dates and back, in any timezone.
UUID / ULID Generator
Generate UUID v4 and ULID identifiers in bulk for databases, APIs and tests.
Hash Generator
Generate MD5, SHA-1, SHA-256 and other hashes to verify files and data offline.
QR Code Generator
Create QR codes from text or URLs, generated entirely on your device.
DevT Pro includes 120+ tools in total; see the full tool list on the homepage.
Your data stays on your machine.
Online formatters and decoders ask you to paste API responses, access tokens and config files into a page you don't control. DevT Pro runs every tool locally, so the same jobs work with no upload, no account and no internet connection.
Private by default
JWTs, credentials and customer data are decoded and converted on your device. Nothing is sent to a server, and there is no telemetry.
One app, every tool
Open any of the 120+ tools from the command palette and keep several in tabs, instead of juggling a browser tab for each website.
Every platform
The same tools on macOS, Windows, iPadOS and Linux, for a one-time $9.99 with no subscription.
Just need a quick conversion in the browser? Try the free online developer tools, which also run entirely client-side.