QSTools
Fast developer tools. Private by default.
Format, decode, and generate — runs in your browser. No account.
Tools
Pick a tool — runs in your browser, nothing uploaded.
JWT Decoder
Decode header and payload. Nothing is sent to a server.
Open toolJSON Formatter
Pretty-print and validate JSON instantly.
Coming soonBase64 Encode / Decode
Encode or decode Base64 text and bytes.
Open toolUUID Generator
Generate UUID v4 values locally.
Open toolTimestamp Converter
Unix time ↔ human-readable dates.
Coming soonPassword Generator
Strong random passwords in your browser.
Open toolUTM Builder
Build clean campaign URLs with UTM tags.
Open tool