toolbox
Small single-purpose tools, built as I need them. Search or filter by tag.
Read a cron expression in plain words, see what each field allows, and list the next run times in your timezone.
Look up A, AAAA, CNAME, MX, TXT, NS, SOA, and CAA records over DNS-over-HTTPS, with a Cloudflare, Google, or Quad9 resolver.
Paste an IPv4 or IPv6 address to see its type and special-use block, every representation, and its reverse-DNS name.
Pick a cut and its weight for a starting smoker temperature, a target internal temperature, and a rough time window.
Turn text into ASCII banners: block letters, boxed borders, underlined headings, or unicode-styled runs.
Convert text to Base64 and back, UTF-8 safe. Toggle the URL-safe alphabet, or swap input and output in one click.
Paste JSON to reformat it: choose the indent, sort keys, or minify. Parse errors point at the line and column.
Split a JSON Web Token into its header and payload, pretty-print the claims, and read the timestamps. Signature is not verified.
IPv4 address + prefix in, network / broadcast / host range / mask out. Click the bit bar to set the prefix, and split a block into smaller subnets.
Enter any two of voltage, current, resistance, and power. Get the other two, with a live circuit diagram.
Click the bands to read a resistor, or type a value to see its stripes. 4, 5, and 6-band.
Plan two floating shelves on a wall: enter measurements, get a scaled elevation drawing and a wall-marking sheet.
Generate random v4 UUIDs. Click a value to copy it.
Two resistors, one tap. See the output voltage, how a load pulls it down, and solve for a resistor pair that hits a target.
Count words, characters, sentences, and reading time as you type.