Free browser tools

Small, useful tools from Hello Good Day. They run in your browser, with no account, and what you type stays on your device.

• Stitch and Row Calculator

  Work out how many stitches to cast on and how many rows to work from your gauge swatch and target size, in inches or centimeters.

• ASL Name Fingerspeller

  Type a name and see the American Sign Language handshape for each letter, with notes on the motion for J and Z.

• LED Banner

  Turn your phone or laptop into a full-screen scrolling LED banner. Type a message, pick colors and speed, and hold it up. No flashing.

• Days Until Countdown

  Count the days until a birthday, trip or wedding. Name your date and share a link that opens the same countdown.

• Complaint Letter Generator

  Turn what happened into a dated timeline and a clear complaint letter. Stays in your browser, nothing is sent. Copy or print. Not legal advice.

• Split-Flap Message Maker

  Write a message on a departure-board style split-flap display and share a link that plays it back. Runs in your browser.

• Projector Throw Calculator

  Work out projector throw distance or image size from your throw ratio, with the formula shown. Results are estimates, and projector specs vary.

• Heart-Rate Zones

  Estimate five heart-rate zones from your age using the common 220 minus age formula. An estimate only, and not medical advice.

• Printable Blank Calendar

  Make a blank monthly or full-year calendar for any year. Choose Sunday or Monday starts, add a title, and print.

• App Store Screenshot Size Checker

  Check whether an image matches an App Store screenshot size, using Apple's specifications. Your image stays on your device, never uploaded.