Unix Timestamp Converter: free online, fast and secure
Databases, APIs and logs store time as Unix timestamps: seconds since 1 January 1970 UTC. This converter turns them into readable dates in your time zone, India Standard Time, UTC and ISO 8601, plus “how long ago”.
It also converts any date and time back into a timestamp in seconds and milliseconds, and shows the live current epoch time.
How to use Unix Timestamp Converter
- Enter a timestamp. Seconds or milliseconds are detected automatically.
- See the date. Local, IST, UTC, ISO and relative time.
- Or pick a date. Get the timestamp for any date and time.
Why use ConvertKaro Unix Timestamp Converter? Free, fast and secure
There are many Unix Timestamp Converter websites, but most of them upload your files, add watermarks or ask you to pay. Here is why this one is better.
100% Free
Unix Timestamp Converter on ConvertKaro costs nothing. There is no trial, no premium plan and no hidden limit, so you can use it as often as you like.
Fast results
Because nothing travels to a server, results appear almost instantly. Large files are limited only by the speed of your own phone or computer.
Secure and private
Nothing is uploaded. Sensitive files like Aadhaar, PAN, salary slips or contracts stay on your own phone or laptop the whole time.
No signup, no watermark
No account, no email and no watermark on your result. Open the page and start.
Works on every device
Designed for mobile first, so it works just as well on your phone as on a desktop computer.
IST built in
See India Standard Time directly, whatever your device time zone.
ConvertKaro vs other websites and apps
| ConvertKaro | Typical website or app | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your data | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
Common uses for Unix Timestamp Converter
- Debugging API and database timestamps
- Reading server logs
- Setting expiry times in tokens
- Scheduling cron jobs
- Comparing events across time zones
Tips for the best results
- 13-digit numbers are milliseconds; 10-digit numbers are seconds.
- JWT exp and iat values are in seconds.
- Decode tokens with the JWT Decoder.
- Calculate date gaps with Date Difference Calculator.
Good to know
Developers often paste API keys, tokens, customer data and internal code into online tools without thinking about where that data goes. Many “free” developer websites send everything to their servers and log it. Unix Timestamp Converter runs completely in your browser using standard web APIs, so it is safe for production data. It also works offline once loaded, which makes it handy on slow connections or restricted networks.
| Price | Free, no limits |
|---|---|
| Processing | In your browser, instant |
| Signup | Not required |
| Watermark | None |
| Works on | Android, iPhone, Windows, Mac, Linux |
| Category | Developer tools |
How Unix Timestamp Converter keeps your code and data private
Unix Timestamp Converter is written in JavaScript and runs entirely inside the browser tab you have open. When you type or paste, the result is calculated on your own device. Nothing is sent to ConvertKaro or any third party, nothing is saved in a database, and there are no accounts or tracking of what you enter. That makes it safe for private code and data, such as salary figures, client data, API keys or personal notes.
Using Unix Timestamp Converter on your phone
Unix Timestamp Converter is designed for small screens. Buttons are large, options are simple, and results update as you type. On iPhone, downloaded files appear in the Files app under Downloads; on Android they go to the Downloads folder.
Who uses Unix Timestamp Converter?
Here are some of the people who find this tool most useful:
- Web developers and programmers
- Students learning coding and web design
- Digital marketers and SEO specialists
- Testers and support engineers debugging data
- Small business owners managing their own websites
Supported input: Plain text, JSON, CSS, JavaScript, HTML, URLs, Base64, tokens and image files where relevant.
Frequently asked questions
What is a Unix timestamp?
The number of seconds since 00:00:00 UTC on 1 January 1970.
Seconds or milliseconds?
JavaScript uses milliseconds (13 digits); most APIs and databases use seconds (10 digits).
What is the 2038 problem?
Old 32-bit systems overflow on 19 January 2038; modern 64-bit systems are not affected.
Is Unix Timestamp Converter really free?
Yes. Unix Timestamp Converter on ConvertKaro is 100% free with no limits, no signup and no watermark. There is no paid version.
Is it safe to use Unix Timestamp Converter online?
It is one of the safest ways to do it, because nothing is uploaded. All processing happens locally on your device, and the data disappear when you close the page.
Does Unix Timestamp Converter work on mobile?
Yes. It works in Chrome and Safari on Android phones and iPhones, as well as on tablets and computers. No app is needed.
Do I need to install anything to use Unix Timestamp Converter?
Nothing to install. Open the page in any modern browser and it works immediately, even offline after loading.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Copy or download the result as it is.
Does Unix Timestamp Converter work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.
Related free tools
People who use this tool often need these too: JWT Decoder, Date Difference Calculator, Age Calculator, UUID Generator, JSON Formatter.