14 WORKING TOOLS
Private developer tools
Handle small development tasks in a local browser workspace. These utilities are useful for logs, test data, URLs and tokens that should not be pasted into an unknown service.
14 live toolsNo placeholder cards.
No upload stepCore work stays in the browser.
Clear limitationsInspection tools do not prove that external data is safe or authentic. For example, decoding a JWT does not verify its signature.
CHOOSE A TASK
All developer tools
Open a guide to understand the workflow, then launch the working tool when you are ready.
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SHA-256 file checksum
Verify a file without uploading it.
Free · private · open guide →IDUUID generator
Generate secure random UUIDs.
Free · private · open guide →✱Password generator
Create strong passwords locally.
Free · private · open guide →◷Timestamp converter
Convert dates and Unix timestamps.
Free · private · open guide →?Random list picker
Pick one item using secure randomness.
Free · private · open guide →◑Colour contrast checker
Measure WCAG contrast ratio.
Free · private · open guide →◒CSS gradient maker
Build and copy a linear gradient.
Free · private · open guide →□CSS shadow maker
Design and copy a box shadow.
Free · private · open guide →HText hash generator
Create SHA hashes from pasted text.
Free · private · open guide →JWTJWT decoder
Inspect token headers and payloads locally.
Free · private · open guide →?=Query string converter
Convert URL parameters to and from JSON.
Free · private · open guide →0xNumber base converter
Convert binary, octal, decimal and hex.
Free · private · open guide →&;HTML entity converter
Encode or decode HTML-safe text.
Free · private · open guide →◉HEX, RGB & HSL converter
Translate common colour formats.
Free · private · open guide →