Termina365
Free online utility tools — calculators, converters, text and developer tools.
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Image
- Image Compressor Reduce JPG size by adjusting quality
- Image Resizer Resize with ratio lock & social presets
- Format Converter Convert between JPG, PNG and WebP
- Image Cropper Drag to select an area, or crop by coordinates/ratio
- Rotate & Flip Rotate 90/180°, flip horizontally or vertically
- Watermark Add a text watermark to an image
- Pixelate / Mosaic Pixelate the whole image or a selected area
- Instagram Grid Split a square image into an N×N grid
- Color Extractor Extract a color palette (HEX) from an image
- Favicon Generator Make favicons (16·32·48·180) from an image
- Image Merger Join images horizontally or vertically
- EXIF Remover Strip location & metadata from photos
Calculators
- BMI Calculator Body mass index from height & weight
- Age Calculator Exact age from date of birth
- Compound Interest Principal, rate & term to final amount
- Discount Calculator Discount rate & amount from prices
- Bill Splitter Split a total among people
- Tip Calculator Tip and total by percentage
- 1RM Calculator Estimate one-rep max from weight & reps
- BMR Calculator Basal metabolic rate from height, weight, age
- Loan Calculator Monthly payment & total interest
- Savings Interest Deposit/installment maturity interest
- VAT Calculator 10% VAT (supply price ↔ total)
- Weekly Holiday Pay Korean weekly holiday allowance
Date/Time
- D-Day Counter Days left until a target date
- Days Between Dates Number of days between two dates
- Day of the Week Find the weekday of a date
- Sleep Calculator Bed/wake time by 90-min cycles
- Ovulation Calculator Predict ovulation & fertile window
- Pregnancy Weeks Pregnancy weeks & due date from LMP
Unit Convert
- Length Converter mm·cm·m·km·inch·ft·mile
- Weight Converter g·kg·t·oz·lb
- Data Size Converter B·KB·MB·GB·TB (base 1024)
- Temperature Converter Celsius · Fahrenheit · Kelvin
- Base Converter Binary · Octal · Decimal · Hex
- Pyeong Converter Pyeong ↔ square meters
Colors
- Color Code Converter Convert HEX · RGB · HSL
- Contrast Checker WCAG contrast ratio & pass/fail
- CSS Gradient Generate CSS gradient code
Text
- Character Counter Count characters, words, lines
- Manuscript Sheets Count 200-char manuscript sheets
- Reading Time Estimated time to read a text
- Case Converter UPPER · lower · Title case
- Number to Korean Amount to Korean words (for contracts)
Developer
- Base64 Encode/Decode Text ↔ Base64 (Unicode-safe)
- UUID Generator Generate standard UUID v4
Fun
- Coin Flip Flip coins, show statistics
- Dice Roller Roll dice (e.g. 2d6)
- Ladder Game Randomly pair people with outcomes
- Roulette Pick one option at random