Useful tools, one tab away
Solve the task.
Keep your data.
Direct, free technical utilities designed to run in your browser without accounts or installations.
Start here
What do you need to do?
- Verify a file checksumCompare a local file up to 20 MiB with a SHA-256 reference.
- Find a JSON errorLocate the first syntax error and check duplicate keys.
- Fix YAML indentationCompare spaces, tabs and nesting with reproducible examples.
- Convert a date to a timestampUse manual dates or ISO 8601 with an offset and milliseconds.
- Calculate an IPv4 subnetFind the network and host range from an IP and a CIDR or mask.
- Check a Modbus CRCStart with CRC-16/MODBUS and hexadecimal bytes; compare byte order.
Explore
A clear structure for finding what helps.
Principles
Useful before impressive.
- 01
No account
Open, solve and continue with your work.
- 02
Local-first
Your data stays on your device whenever possible.
- 03
Human review
A focused catalogue with verified examples and edge cases.