Developer Toolkit — Streamline Your Development
Free online tools and resources for timestamp conversion, text diff, and JSON format conversion
Featured tools
Time Tools
Unix Timestamp Converter
Convert Unix timestamp to date online, switch between Epoch seconds and milliseconds
Text Tools
Text Difference Comparator
Quickly locate differences, supports side-by-side or inline view
Time Tools
Time Unit Converter
Convert seconds to minutes, hours to days, supports batch conversion and formatted input
Latest updates
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Lite Plan
- Ad-free experience
- More perks coming soon
Core advantages of Developer Toolkit
Built for high-frequency developer workflows: free, fast, and privacy-first.
Efficient time tools
Convert Unix timestamps and dates, switch between time units, and process batches in one place for everyday time calculations.
Powerful text and format tools
Text diff supports side-by-side and inline views, while JSON to PHP, JSON↔YAML, and JSON→CSV cover common format conversions.
Covers common dev scenarios
Includes URL/Base64/Unicode encoding, QR generation and scanning, XML validation, and regex testing for daily development tasks.
Free core, continuously improved
Core tools stay free for individuals and small teams, with ongoing updates to help you ship faster.
Fast processing experience
Browser-side computation and lightweight interactions provide near-instant results for most operations.
Privacy-focused by design
Inputs are handled in the browser whenever possible, without relying on server-side storage of raw content.
Why choose Developer Toolkit
Developer Toolkit provides ready-to-use online utilities for time conversion, text comparison, format conversion, and code-related tasks. It supports multilingual UI and dark mode, with a strong focus on speed, usability, and data privacy.
Frequently asked questions
Quick answers about features, pricing, and privacy.
What is Developer Toolkit?
Developer Toolkit is an online utility platform with tools for time conversion, text comparison, format conversion, and code-related workflows.
How do I use the Unix timestamp converter?
Open the timestamp tool, enter a timestamp or date-time value, and get instant conversion results with seconds/milliseconds and timezone support.
When should I use the text diff tool?
It is useful for code reviews, config comparisons, and document revisions where you need to quickly spot additions, removals, and edits.
Which units are supported in the time converter?
It supports milliseconds, seconds, minutes, hours, days, and weeks, with multi-value input and fast conversion.
What JSON conversion features are available?
You can convert JSON to PHP arrays, JSON↔YAML, and JSON→CSV for API debugging, data transformation, and config migration.
Do I need an account to use the tools?
Most core tools are available without login, so you can use them directly after opening the page.
Are core tools paid?
Core capabilities are free. Some advanced features may be added progressively; please refer to in-product pricing details.
Do you store my data?
We prioritize privacy. The toolkit is designed for browser-side processing and does not target storing user input/output content.
Do you support multiple languages and dark mode?
Yes. The interface supports multiple languages and theme switching for different workflows and preferences.
How can I contact you?
You can reach us at support@ilovedevtool.com and we will follow up as soon as possible.
User feedback
Real experiences from different developer roles.
The timestamp and text diff tools are extremely practical and save me a lot of repetitive work every day.
The diff tool makes code review much faster. I can spot changes immediately and collaborate more efficiently.
The time unit converter and JSON tools are easy to use and very helpful for both learning and real tasks.
It feels fast and smooth. Great for API debugging and quick data conversions.
Our team adopted it quickly, and overall delivery speed became more stable.
Clean UI and broad feature coverage. It handles most day-to-day development utility needs.