Encoding and tokens
Base64, URLs, HTML entities, hashes and JWTs.
Patterns and time
Regex, cron, timestamps and UUIDs.
Guides
How to convert a Unix timestamp
Turn epoch seconds or milliseconds into a readable date in UTC or your time zone, convert a date back to a timestamp, and avoid the usual off-by-1000 and time-zone mistakes.
4 min readHow to convert CSV to JSON
Turn spreadsheet exports into JSON arrays for code and APIs, with header rows, quoted fields and number detection, and convert JSON back to CSV.
4 min readHow to convert YAML to JSON
Convert YAML config files to JSON and JSON to YAML, and avoid the classic YAML traps such as no becoming false and version numbers losing zeros.
4 min readHow to decode a JWT
Read the header, payload and expiry of a JSON Web Token safely, understand exp, iat and nbf, and why decoding is not the same as verifying.
4 min readHow to format and validate JSON
Pretty-print or minify JSON, find the exact line and column of a syntax error, and fix trailing commas, comments and quotes, privately in your browser.
4 min readHow to format SQL
Turn one-line SQL into readable, consistently indented queries, choose the right dialect, and follow a few conventions that make reviews easier.
Questions about developer tools
Is it safe to paste tokens and secrets?
The tools run entirely in your browser and send nothing to a server. Still, treat secrets carefully and avoid sharing your screen while they are visible.
Is it really free?
Yes. There is no sign-up, no watermark, no daily limit and no paid plan. openWorkstand is paid for by a few ads on its public pages.