Unix Time Converter
Convert Unix timestamps to human-readable dates and back. Shows UTC, ISO 8601, locale, date, and time formats. Milliseconds, seconds, and ISO 8601 convert both directions with timezone clarity — local math, free, no signup.
How to Use the Unix Time Converter
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Frequently Asked Questions
What's percent-encoding?
Percent-encoding (URL encoding) replaces unsafe URL characters with % followed by two hex digits. Spaces become %20, special characters become %XX. This ensures URLs are transmitted correctly over HTTP.
When should I encode vs decode?
Encode when building URLs programmatically — query strings, form data, redirect URLs. Decode when reading encoded URLs you received from APIs or webhooks.
Does it handle UTF-8 characters?
Yes. Non-ASCII characters like emojis, accented letters, and CJK characters are properly encoded as UTF-8 byte sequences (e.g., é becomes %C3%A9).
Can I encode just the query string, not the whole URL?
Yes. Paste a full URL or just the query parameters. The tool can encode/decode the entire string or just specific parts.
When using Unix Time Converter, is the conversion done locally?
Yes. All encoding and decoding happens in your browser. No data is sent to any server.
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Last updated October 2026