Epoch Buddy: Unix Timestamp & Date Converter

Stop copying epoch timestamps to random websites. Epoch Buddy converts Unix timestamps to human-readable dates instantly — right on any webpage or from the popup. Seconds, milliseconds, dates, relative time — all covered. Fast, private, and works completely offline. WHY DEVELOPERS LOVE EPOCH BUDDY Epoch timestamps are everywhere: server logs, monitoring dashboards, API responses, database records, incident timelines, support tickets, and more. Every time you see a 10-digit or 13-digit number and wonder "what time was that?", Epoch Buddy gives you the answer in seconds — without leaving your tab, without any external site, and without ever sending your data anywhere. FEATURES 1) Highlight-to-Convert on Any Webpage Select any epoch timestamp on any website and get an instant inline popup showing: - GMT / UTC time - Local time in your timezone - Relative time (e.g. "3 hours ago" or "in 2 days") - One-click copy buttons for each value Works on regular text, input fields, and text areas across every website. 2) Popup Converter with Three Powerful Modes Click the extension icon to open a clean, keyboard-friendly popup with three tabs. Your current timezone and UTC offset are shown in the header at a glance. A) Epoch to Date Paste or type any Unix epoch value (seconds or milliseconds). The input auto-fills with the current epoch and live-refreshes every second. Pause it by clicking in — it resumes when you clear the field. A dedicated clock button copies the current millisecond timestamp and fills the input field. Output: Epoch (ms), GMT/UTC, Local time, Relative time. B) Date to Epoch Enter a date and time using validated numeric fields (year, month, day, hour, minute, second, millisecond) with per-field error highlighting. Switch between Local and GMT/UTC timezone. Time presets — Start of Day, End of Day, or Current Time — sit inline with the time fields for quick access. Click "Convert ISO String" to flip the form into ISO 8601 mode: paste an ISO string (e.g. 2026-03-19T12:00:00.000Z) with an optional fallback timezone selector, then convert. Click "Enter Date Manually" to flip back. Output: Epoch (ms), Epoch (s), Relative time. C) Relative to Epoch Build a timestamp relative to "now". Choose Ago or From Now, then enter any combination of Days, Hours, Minutes, Seconds, and Milliseconds. Overflow values are automatically normalized (e.g. 90 minutes becomes 1h 30m). Smart display shows only relevant units — no clutter. Output: Epoch (ms), UTC/UTC, Local time, Relative time. 3) Conversion History Your last 10 conversions are saved locally with quick copy buttons. View them anytime in the History section. Clear all history with one click. Nothing is sent to any server — everything stays in your browser. 4) Dark Mode Full dark mode support that follows your system preference, or set it manually to Light, Dark, or System. Applied across both the popup and the on-page conversion tooltip. 5) One-Click Copy Every converted value comes with a copy button. Hover over any result row in the on-page popup or click the copy icon in the extension popup. Copies to clipboard instantly. PRIVACY & PERFORMANCE - Zero external network requests — works 100% offline - No accounts, no sign-ups, no logins - No analytics, no trackers, no telemetry - No data leaves your browser — ever - Lightweight and blazing fast - Open source: https://github.com/ShivamS136/epoch-buddy SUPPORTED INPUTS - Unix epoch in seconds (10 digits, e.g. 1714000000) - Unix epoch in milliseconds (13 digits, e.g. 1714000000000) - Commas and underscores allowed (e.g. 1,714,000,000 or 1_714_000_000) - ISO 8601 strings (e.g. 2026-03-19T12:00:00.000Z) in Date → Epoch ISO mode PERFECT FOR - Backend & frontend developers debugging timestamps - DevOps & SRE teams during incident response - Log analysis in observability and monitoring tools - API development and testing - QA engineers validating timestamp fields - Database administrators inspecting epoch columns - Anyone tired of Googling "epoch to date converter" WHAT'S NEW IN v1.4 - ISO 8601 string input mode in Date → Epoch (with fallback timezone selector) - Copy current epoch (ms) button in Epoch → Date that also fills the input field - Numeric input fields with per-field validation and error highlighting - Automatic normalization of overflow values in Relative tab - Time presets moved inline with time fields for a more compact layout - Current timezone and UTC offset shown in the popup header - Date fields require a value; time fields default to zero on blur WHAT'S NEW IN v1.3 - Relative to Epoch converter tab - Time presets (Start of Day, End of Day, Now) - Dark mode with system preference detection - Improved on-page popup positioning with smart arrows - Conversion history with quick copy