Keep multiple tasks open
Leave a JSON formatter open in one tab, a regex tester in another and a converter in a third instead of reopening separate websites for every operation.
DevT Pro for Windows
Developer tools for Windows, in one local app.
Format JSON, decode JWTs, test regular expressions, convert structured data, generate code, inspect timestamps, calculate hashes, work with Base64 and handle dozens of other small development tasks without bouncing between browser utilities.
Windows 10 or 11 · 120+ tools · $5.99 one-time · No subscription
Windows 10 & 11
x86-based PCs
ARM via emulation
Works offline
No account
One local toolbox
A developer toolbox that can stay open beside your IDE.
Most developer utility tasks are small. That is exactly why they interrupt your flow so easily. You copy an API response into a formatter. You search for a JWT decoder. You need a UUID. An API's documentation gives you cURL but your project uses C#. A log contains a timestamp you need to inspect. DevT Pro keeps them together in one desktop application so the utility layer of development can stay close to Visual Studio, VS Code, Rider, your terminal and the rest of your Windows setup.
Keep sensitive data local
Tokens, request headers, internal JSON and other development data can be processed on your PC instead of pasted into unrelated web utilities.
Keep working offline
Normal tool operations do not depend on an internet connection, login or remote processing service.
Popular tools
Popular DevT Pro tools for Windows.
DevT Pro includes more than 120 tools. These are a few of the common ones you can keep one search away on your PC.
- JSON Formatter Turn compact or messy JSON into clean, readable data while working with API responses, logs and configuration.
- JWT Decoder Inspect JWT headers and payloads locally instead of pasting authentication tokens into an online decoder.
- Base64 Decoder Decode Base64 values from APIs, headers, configuration and application data.
- Regex Tester Test expressions against real sample text while building validation, extraction and search patterns.
- cURL to Python Turn a working cURL request from API documentation into Python code without manually recreating URLs, headers and request options.
- UUID / ULID Generator Generate identifiers whenever you need test values, database keys or application IDs.
120+ built-in tools
More than formatters and encoders.
DevT Pro is designed as a broad everyday toolbox rather than a collection of separate mini-apps.
Converters
Move data between JSON, CSV, YAML, XML, TOML, TSV, TOON and other formats, with structured-data transformations in both directions.
Code generators
Turn structured input into source code: JSON to C#, TypeScript, Java, Kotlin, Swift or Go, and cURL to C#, Python, JavaScript, TypeScript, Rust or Go.
Encoders & decoders
Base64 encode and decode, URL encode and decode, JWT decoding, HTML entities, hex and ASCII conversion, backslash escape and unescape.
Validators, formatters & minifiers
Clean up and validate structured data for JSON, XML, YAML, TOML, SQL and other common formats.
Viewers & previewers
Inspect structured formats in a more useful representation and preview content such as HTML and Markdown.
Everyday utilities
Regex testing, timestamps, UUID and ULID generation, cron parsing, text diffing, color conversion, hashes, encryption, QR tools, password generation, unit conversion and more.
Windows workflow
A practical Windows workflow.
DevT Pro is designed to behave more like part of a development setup than a collection of web forms: fast search, tabs and code-oriented editing rather than a long list of disconnected forms.
Keep it beside Visual Studio or VS Code
Use DevT Pro as a companion application for the small transformations and inspections that happen throughout development.
Move between tools with tabs
Keep several utility contexts alive at once instead of repeatedly copying data into new browser tabs.
Search instead of browsing
The command palette helps you jump to a known tool quickly when the catalog grows beyond a handful of utilities.
Work with developer-focused editors
Text-heavy tools use code-oriented editing with syntax highlighting, code folding and find-and-replace where applicable.
Drop files into supported tools
Supported converters, validators, viewers, previews and the Diff Viewer can accept file input directly, which is useful when the data already exists as a local file.
Local first
Keep development data on your PC.
Online developer utilities are convenient, but real inputs are not always harmless sample data. A JWT may contain user identifiers and permissions. A cURL command may contain a bearer token. JSON may contain internal API output or customer data. Logs can contain private identifiers. Configuration can contain URLs and environment-specific values.
DevT Pro performs normal tool operations locally on your Windows device. No account is required, and the app does not include telemetry or analytics. Features that explicitly load a remote URL access the network only when you ask them to load that content. For everyday formatting, conversion, encoding, decoding, generation and inspection, your workflow stays local.
Desktop app vs browser utilities
DevT Pro vs one-off browser tools.
| Workflow | DevT Pro on Windows | Typical one-off web utility |
|---|---|---|
| Common developer utilities | 120+ tools in one app | Usually one task per site |
| Normal processing | Local | Depends on the site |
| Account required | No | Varies |
| Offline use | Yes for normal tool operations | Usually no |
| Multiple tasks | Tab-based workflow | Separate browser tabs/sites |
| Developer text input | Code-oriented editors | Often a plain textarea |
| Pricing | $5.99 one-time Pro unlock | Free, paid, ads or subscription depending on site |
Requirements & pricing
DevT Pro on Windows
- Operating system: Windows 10 or Windows 11
- Architecture: x86; ARM supported through emulation
- Distribution: Microsoft Store
- Price: $5.99 one-time Pro unlock
- Subscription: None
- Account: Not required
The same DevT Pro toolbox is also available on Mac and iPad.
Questions
DevT Pro for Windows FAQ
What developer tools are included in DevT Pro for Windows?
DevT Pro includes more than 120 utilities across converters, formatters, validators, encoders and decoders, code generators, cryptography, date tools, viewers, previewers, QR tools and other everyday development utilities.
Does DevT Pro work offline on Windows?
Yes. Normal tool operations run locally and do not require an internet connection. Features that explicitly load a remote URL use the network only when you request remote content.
Does DevT Pro upload my JSON, JWTs or API requests?
Normal formatting, conversion, decoding and inspection happens on your device. DevT Pro requires no account and does not include telemetry or analytics.
Does DevT Pro work on Windows 10?
Yes. DevT Pro supports Windows 10 and Windows 11.
Does DevT Pro support Windows on ARM?
DevT Pro can run on ARM-based Windows devices through emulation.
Is DevT Pro a subscription?
No. The Pro unlock costs $5.99 as a one-time purchase. There is no recurring subscription.
DevT Pro for Windows
One toolbox for the small jobs between the big ones.
DevT Pro is built for the moments between writing code: formatting an API response, decoding a token, converting data, generating a model, testing a regex or producing an identifier. Instead of collecting bookmarks for dozens of single-purpose utility websites, keep the tools together in one local Windows app.
$5.99 one-time Pro unlock · No subscription · Windows 10 or 11