14 BROWSER-BASED 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 browser-based toolsChoose the task you need.

Files stay localCore 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

Each link opens the tool workspace directly and shows its limitations before processing.

SHA-256 file checksum

Verify a file while it stays on your device.

Free · private · open tool →ID

UUID generator

Generate secure random UUIDs.

Free · private · open tool →✱

Password generator

Create strong passwords locally.

Free · private · open tool →◷

Timestamp converter

Convert dates and Unix timestamps.

Free · private · open tool →?

Random list picker

Pick one item using secure randomness.

Free · private · open tool →◑

Colour contrast checker

Measure WCAG contrast ratio.

Free · private · open tool →◒

CSS gradient maker

Build and copy a linear gradient.

Free · private · open tool →□

CSS shadow maker

Design and copy a box shadow.

Free · private · open tool →H

Text hash generator

Create SHA hashes from pasted text.

Free · private · open tool →JWT

JWT decoder

Inspect token headers and payloads locally.

Free · private · open tool →?=

Query string converter

Convert URL parameters to and from JSON.

Free · private · open tool →0x

Number base converter

Convert binary, octal, decimal and hex.

Free · private · open tool →&;

HTML entity converter

Encode or decode HTML-safe text.

Free · private · open tool →◉

HEX, RGB & HSL converter

Translate common colour formats.

Free · private · open tool →