Sleep Log Tracker - Online Record Hours & Quality
Log the hours you slept each night and rate the quality. See a weekly bar chart. Local storage.
UD5 Toolkit
Track your project hours with ease — no sign-up required.
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Log the hours you slept each night and rate the quality. See a weekly bar chart. Local storage.
Log daily sleep to see cumulative sleep debt or surplus over weeks. Visualizes chronic sleep loss trends. Stores data locally in your browser only.
Set your desired retirement date and see a live countdown of remaining days, hours, minutes. Totally motivating.
Track up to 5 habits with a visual chain. Tap to mark day as done, see longest streaks. Data saved in your browser. Inspired by 'Don't break the chain' method.
Upload an MP3 or WAV file and get an estimated beats per minute using onset detection. DJs and musicians can quickly catalog track tempos.
Use a coin for scale and log the size of swelling after an insect sting over time. Detect allergic progression.
Tap any key to the beat and get the BPM (beats per minute). Useful for DJs, musicians, and running. Simple and accurate.
Inspect any website's SSL/TLS certificate details: issuer, expiry date, subject, and SANs. Verify certificate chains. All checks are private and require no server upload.
Load a video and visually check if audio aligns with lips. Use frame‑by‑frame stepping. Debug playback issues.
Compare all CSS easing presets side by side on a bouncing ball. See which curve fits your UI animation.
Lay down a beat on a grid sequencer for kick, snare, and hi-hat. Play, loop, and adjust tempo. All sound via Web Audio API.
Display striped patterns that can cause visual distortion. Learn about visual stress. Switch colors.
Visualize the probability distribution of dice rolls as a color‑coded heatmap. For any NdM combination. RPG strategist's dream.
Apply compression and limiting to an audio file with threshold, ratio, attack, and release controls. Improve loudness. All local.
Convert WAV audio files to MP3 directly in your browser using a built‑in codec. Choose bitrate and quality. No upload.
Enter a domain and see its SSL certificate details: issuer, validity dates, and chain. Client‑side fetch.
Convert English words into their International Phonetic Alphabet (IPA) representation. For pronunciation learning. Local.
Translate text into semaphore flag positions and decode semaphore back to letters. Interactive animated flags. For scouts and maritime fans.
Choose your tea type and start a precise steeping timer with color‑changing background. Never over‑steep again.
Type a negative thought and see which cognitive distortion it matches. Get a suggestion for reframing. Self-help tool.
Paste raw email headers and see authentication results (SPF, DKIM, DMARC) in a readable table. Find spoofing attempts.
Check which cipher suites a website supports and identify weak or outdated ones. Quick security audit from your browser.
Paste a Bitcoin, Ethereum, or other crypto wallet address and quickly verify its format and checksum. No connection to blockchain.
Hold a gentle smile for a set duration while looking at a calming image. A simple, evidence‑based mood booster based on facial feedback hypothesis.
Change audio files between MP3, WAV, FLAC, and OGG. Choose codec and bitrate. Works completely offline in the browser.
Convert numbers between binary, octal, decimal, hex, and any custom base up to 36. With live preview of all bases.
Convert JSON‑LD structured data into Turtle (TTL) notation. For semantic web and linked data developers. Client‑side.
Follow an animated circle that guides you through the 4‑7‑8 breathing pattern. Inhale 4s, hold 7s, exhale 8s. Counts cycles and provides haptic cues.
Encode any text, including emojis and foreign scripts, into a Base64 string. Perfect for data URLs. Local.
Decode a Base64 encoded string that contains UTF‑8 text (emojis, international characters). See the raw output. Local.