Advanced Eye Exercise Timer – Online 20‑20‑20 + Focus Shift
Alternates between near and far focus cues with timed breaks. Reduce digital eye strain.
UD5 Toolkit
Online Brainwave Focus & Relax – Enhance Your Mental State
Left: 200 Hz | Right: 210 Hz | Beat: 10 Hz
Use stereo headphones for best effect
Alternates between near and far focus cues with timed breaks. Reduce digital eye strain.
Use your device's orientation sensor or manually enter a location to find the bearing toward Mecca. Simple compass tool.
Set an alarm that rings at a specific time even if the tab is in background. Multiple alarm tones. Works offline.
Display a stylish retro flip clock or Nixie tube clock in full screen. Perfect for desk presentation or decoration. Pure CSS and JS.
Set a wake-up time and the screen gradually brightens from dark to warm yellow. Use as a gentle alarm.
View the current time in binary (BCD) format. A stylish geek clock with dot columns. Toggle between binary and decimal labels.
Find the optimal go‑to‑sleep or wake‑up times based on 90‑min sleep cycles. Wake up between REM cycles and feel refreshed.
Route your microphone input through a chain of virtual effects (distortion, reverb, delay) using Web Audio API.
Enter a future eclipse date and approximate location to see estimated contact times. Event countdown.
Run a countdown timer that automatically repeats for a set number of laps. Great for HIIT, study sprints, or any interval work.
Generate cryptographic and checksum hashes for any text string. Supports MD5, SHA-1, SHA-256, and CRC32. All hashing runs locally for maximum privacy.
Watch a color sequence and click the same pattern. Gets longer each round. Test and improve your working memory. All local.
Create a pure CSS countdown timer with a flipping number effect. Adjust duration and style. No JavaScript needed for display.
Simulate forced‑colors mode and see how your site looks. Adjust CSS system colors. Make your design accessible.
Generate SHA‑1, SHA‑256, SHA‑512, and SHA‑3 digests of any text or file. Verify integrity. All in your browser.
See the current time displayed in binary and hexadecimal. Dark theme, full‑screen mode. A geeky desk decoration.
Automatically improve the contrast of dark or washed‑out photos using histogram equalization. One‑click auto‑tune. All canvas‑based.
Overlay colored blocks and images and apply all mix‑blend‑mode values. Understand how each mode works live.
Select a desired effect (relaxation, focus, energy) and get a suggested essential oil blend with drop ratios. Perfect for diffusers and DIY massage oils.
Input a hex color and adjust its lightness by a percentage. Get tristimulus shades for CSS. Quick and visual.
Enter any hex color and find the nearest Tailwind CSS color class. Also shows the Tailwind palette shade.
Translate HEX colors to HSL values and adjust lightness and saturation visually. Great for creating color variations in CSS design systems.
Click through the TCP connection states (LISTEN, SYN_SENT, ESTABLISHED…) and see the animated transitions. Networking education.
Every second, the background color changes to the hex code corresponding to the current time (HHMMSS). A beautiful, ever‑changing clock.
Convert HSL and HSLA color specifications back to standard HEX codes. Useful when extracting colors from CSS preprocessors. Instant client-side conversion.
Apply a customizable gradient overlay to any image. Perfect for banners and social media. Download the result. Local.
Upload two images and apply CSS blend modes (multiply, screen, overlay, etc.). See the result and copy the filter CSS. Pure frontend.
Randomly generated subnetting questions. Calculate network address, broadcast, and usable range. For CCNA prep.
Upload a screenshot or image and use the magnifying glass to pick exact colors. Get hex, RGB, and HSL. Simple.
Use your webcam to take selfies. Add a simple frame or filter, then download the picture. No upload, just fun.