Free Developer Tools
JSON formatters, encoders, generators — the tools developers reach for every day, all free and browser-based.
Password Generator
Generate cryptographically secure random passwords with custom length and character sets.
→JSON Formatter
Format, minify, and validate JSON data. Instant syntax error detection.
→QR Code Generator
Generate QR codes for URLs, text, email, phone, and Wi-Fi. Download as PNG.
→Random Number Generator
Generate cryptographically secure random numbers. Supports ranges, lists, no-repeat mode.
→Base64 Encoder Soon
Encode and decode Base64 strings. Supports text and file encoding.
→URL Encoder Soon
Encode and decode URLs and query string parameters instantly.
→Hash Generator
Generate SHA-256, SHA-512, SHA-1, and SHA-384 hashes from any text. Runs locally.
→About Our Developer Tools
Developers spend a disproportionate amount of time on small, repetitive tasks: formatting a JSON response to read it properly, generating a QR code for a project, or checking that a random string is truly random. These aren't difficult tasks, but they interrupt focus when there's no quick tool available.
ToolFlash developer tools are designed to handle these tasks in seconds — no account, no ads blocking the interface, no page reload. They work offline in your browser once loaded, so they're available even when your connection isn't.
Available developer tools explained
Password Generator — Generates cryptographically secure passwords using the browser's built-in random number generator. Set custom length and choose character sets: uppercase, lowercase, numbers, symbols.
JSON Formatter — Paste raw or minified JSON and get a cleanly indented, syntax-highlighted result. Validates structure and shows exactly where errors are.
QR Code Generator — Generates QR codes for any URL, plain text, email, phone number, or Wi-Fi credentials. Download as PNG, ready for print or digital use.
Random Number Generator — Generates one or multiple random numbers within a custom range. Supports no-repeat mode for lottery-style picks and list generation.
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