UTC datetime in. Local datetime out.
UTC datetime
2026-08-02 14:30:00
Los Angeles time
2026-08-02 07:30:00 PDT
Tool directory
Browse developer tools
Pick by input and output. Each tool runs in the browser and starts with a sample you can replace.
Time
Time tools
Timestamp in. Readable datetime out.
Unix timestamp
1785681000
Readable datetime
2026-08-02 07:30:00 PDT
Cron in. Explanation and next runs out.
Cron expression
*/15 9-17 * * 1-5
Next run times
Every 15 minutes during work hours
Format
Format tools
Markdown in. Rendered preview out.
Markdown
## Release notes
Preview
Release notes
Raw JSON in. Pretty JSON out.
Raw JSON
{"status":"ok","count":2}
Formatted JSON
{
"status": "ok"
}
JSON
JSON tools
Two payloads in. Changed paths out.
Original JSON
{"plan":"free"}
Changed paths
~ $.plan
Example JSON in. Schema, TypeScript, or Zod out.
Example JSON
{"id":1,"email":"ada@example.com"}
Contract starter
interface Root { id: number; email: string; }
Web
Web tools
URL in. Encoded, decoded, or parsed output out.
URL or component
hello world?x=1&y=two words
Encoded or decoded output
hello%20world%3Fx%3D1%26y%3Dtwo%20words
API
API tools
cURL in. Fetch or Axios out.
cURL command
curl -X POST https://api.example.com
JavaScript request
fetch("https://api.example.com", ...)
Data
Data tools
Rows in. API fixtures out.
CSV or JSON
id,name
1,Ada
Converted data
[{"id":1,"name":"Ada"}]
Auth
Auth tools
Token in. Header and claims out.
JWT
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
Decoded claims
exp: readable datetime