UV Index Reference - Online Exposure Category & Protection
See the current UV index forecast or enter a value to learn protection needed (SPF, hat, shade). Educational.
UD5 Toolkit
Find the perfect lens tint for your activity and lighting conditions. Expert recommendations backed by optical science.
The most natural color perception. Excellent for driving and everyday use in bright conditions.
VLT: 10β20% | Category 3Best For: Driving, everyday, bright sun
Pros: True color perception, reduces overall brightness evenly
Note: Not ideal for low-light or flat-light conditions
Best For: Fishing, skiing, driving, golf
Pros: Enhances contrast, depth perception, blocks blue light
Note: Slightly warm color cast; excellent with polarized option
Best For: Golf, tennis, baseball, general outdoor
Pros: Reduces glare, preserves color balance, soothing
Note: Classic Ray-Ban G-15 style; versatile all-rounder
Best For: Night driving, skiing flat light, overcast
Pros: Maximizes contrast in low light, filters blue haze
Note: Not for bright sun; can distort color perception
Best For: Skiing, cycling, running, snow sports
Pros: Boosts depth perception, sharpens contrast on snow
Note: Can be fatiguing in very bright light; great for variable conditions
Best For: Beach, water sports, fashion
Pros: Reduces glare off water, stylish look
Note: Slight color shift; less ideal for color-critical tasks
Best For: High altitude, water sports, bright snow
Pros: Maximum glare reduction, reflects infrared heat
Note: Category 4 may not be legal for driving in some regions
Best For: Variable conditions, everyday transitions
Pros: Adapts to UV light automatically, convenient
Note: Slower response in cold weather; may not darken inside cars
Best For: Night driving, indoor, screen work
Pros: Maximum light transmission, zero color distortion
Note: Use only for protection (UV/impact); no glare reduction
All lens recommendations assume 100% UV400 protection. Always verify UV protection independently of tint darkness.
See the current UV index forecast or enter a value to learn protection needed (SPF, hat, shade). Educational.
Log your daily water consumption with one click. Set a goal and track progress. Data stored locally for privacy. Simple and clean interface.
Set a timer that reminds you to take a break, stretch, or follow the 20β20β20 rule. Desktop notification supported. Runs offline.
Flashcards for learning Braille. See the dot pattern and type the letter. Track your speed and accuracy. Accessibility education.
Select item rarity and consumable state to get a price range based on Dungeon Master's Guide tables. Quick reference.
Select bracelet type (chevron, candy stripe) and enter rows to estimate total embroidery floss needed per color. Reduce waste.
Select region (US, Canada, International) and see channel frequencies and usage (distress, bridge). Boating safety.
Browse a collection of common bird calls. Play short audio samples to identify birds you hear. Educational static data.
Hear a common bird song and choose the correct species from multiple choices. Ear training for birders.
Set a date when a new fish arrives and get a daily checklist for observation. Countdown to safe introduction.
Trim audio files or split into multiple segments using visual waveform. Set start/end markers precisely. Download segments or merged track. Purely browser-based.
Interactive checklist to build an emergency go-bag. Covers water, food, first aid, tools, documents. Track progress locally. Essential for disaster preparedness.
Drop a WAV file and see its full header: sample rate, bit depth, channels, and chunk structure. Raw bytes explained.
Look up any HTTP status code and see its meaning, RFC reference, and example. Full offline reference.
Select a part of an audio file and trim it to the selection. Playback preview. Download the cropped audio. No upload.
Play standard emergency whistle patterns (SOS, three blasts) using Web Audio. Learn signals for outdoor safety. Offline capable after load.
Use SSML <mark> tags to fire events during TTS. See text highlighted as it is spoken. Understand speech synthesis timing. local.
Paste email headers or body text to quickly spot phishing signs, suspicious domains, and obfuscated links. Educational and private.
Quick eligibility estimator for Canadian GST/HST credit and climate action incentive based on income and family size. For informational purpose only.
Calculate the real monetary cost of a meeting by attendees' hourly rates. A humorous yet insightful productivity tool. All local calculation.
Enter a registration (e.g., N123AB) and convert to the standard phonetic callsign. Aviation enthusiast tool.
See current time in multiple pre-selected cities simultaneously with day/night indicators. No tracking, just a simple multi-clock.
Calculate the output voltage and resistor values for a voltage divider circuit. Includes schematic. Handy for electronics hobbyists and engineers.
Select cities and see a 24-hour grid highlighting compatible meeting times. Drag to find a slot that works for everyone. Daylight saving aware.
Enter total bill, tip %, tax amount, and number of people. Instantly see what each person owes. Handles uneven splits too. No data saved.
Browse a searchable list of standard HTTP request and response headers with explanations. Quick dev help.
Compare the real cost of currency exchange including hidden mark-ups and service fees. See how much you lose per transaction. Local educational tool.
Write a short note and set a specific time for a browser notification reminder. Great for quick oneβoffs. Local.
Remove silent parts from an audio recording. Useful for podcasts and lectures. Set threshold and minimum silence duration.
Enter a domain and see public WHOIS info via a free API with rate limiting. Quick domain check.