DDevKit
Tool collection
{ }JSON Formatter
≠JSON Diff
$.JSONPath Tester
JSJSON Schema Validator
FXJSON Repair
YAYAML JSON Converter
TOTOML JSON Converter
XMXML JSON Converter
TSJSON to TypeScript
JVJSON to Java
PYJSON to Python
GOJSON to Go Struct
C#JSON to C#
KTJSON to Kotlin
SWJSON to Swift
DTJSON to Dart
RSJSON to Rust
IDUUID Generator
64Base64 Encoder
B64Image Base64 Converter
%URL Encoder
.*Regex Tester
JWTJWT Decoder
</>HTML Formatter
#CSS Formatter
◷Timestamp Converter
CRCron Parser
SHAHash Generator
CSVCSV to JSON
±Text Diff
◉Color Converter
IMGImage Converter
MDMarkdown Preview
>cURL Converter
AaCase Converter
***Password Generator
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About DevKit

DevKit is a free collection maintained by developers for recurring development, testing and data tasks.

Our principles

Tools should be fast, clear, account-free and process data locally whenever possible. We publish pages that complete a real task instead of producing empty content at scale.

How tools are built and checked

Each tool is checked with common inputs, invalid inputs and its primary outputs. When formats or standards vary, we document the supported scope and limitations.

Privacy by design

JSON, text, tokens and images are processed in the current browser by default. Tool input is not uploaded to DevKit servers unless a page clearly says otherwise.

Ongoing maintenance

We update tools for browser compatibility, format standards and real usage feedback. Problems can be reported through the contact page.

DevKit

Free online tools built for developers.

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