Are UtiliTools really 100% free?

Yes, all 115+ tools on UtiliTools are completely free with no hidden costs, no premium plans, and no usage limits. The site is supported by non-intrusive advertising.

Do I need to create an account or sign up?

No, UtiliTools requires no sign-up, no email, and no account. Just open any tool and start using it immediately.

Are my files safe? Do you upload them to a server?

Your files are 100% safe. Almost all UtiliTools process files directly in your browser using JavaScript and WebAssembly. Your files never leave your device and are never uploaded to any server.

What tools are available on UtiliTools?

UtiliTools offers 115+ tools across 6 categories: PDF tools (convert, compress), Image tools (convert, compress, resize), Video tools (convert, extract audio), Text tools (case converter, diff, markdown), Developer tools (JSON formatter, Base64, hash generator, regex tester, and more), and Utilities (QR codes, unit converter, password generator, timer).

Does UtiliTools work on mobile devices?

Yes, UtiliTools is fully responsive and works on smartphones, tablets, and desktops. All tools are optimized for touch interfaces and smaller screens.

How is UtiliTools different from other online tool websites?

Unlike most online tool websites, UtiliTools processes your files directly in your browser — no uploads, no server processing, no waiting. This means faster results and complete privacy. Plus, there are no file size limits or daily usage caps.

How do I generate a secure API key?

Select your preferred format (Hex, Base64, Alphanumeric, or Custom), set the desired length, optionally add a prefix like "sk_live_", and click Generate. The tool uses crypto.getRandomValues() for cryptographically secure randomness.

Are the generated tokens cryptographically secure?

Yes, this tool uses the Web Crypto API (crypto.getRandomValues()) which provides cryptographically secure pseudo-random numbers, suitable for API keys, secrets, and authentication tokens.

What token format should I use?

Hex is common for API keys and hash-like tokens. Base64 is compact and widely used in JWT and OAuth. Alphanumeric is easy to read and type. Choose based on your application requirements.

Can I generate multiple tokens at once?

Yes, you can generate up to 20 tokens at once using the bulk generation option. Each token is independently generated with full cryptographic randomness.

What does the entropy estimation mean?

Entropy measures the unpredictability of a token in bits. Higher entropy means the token is harder to guess. A 128-bit entropy is considered secure for most applications, and 256-bit is extremely strong.

Is it safe to generate API keys in the browser?

Yes, UtiliTools generates all tokens locally in your browser using the Web Crypto API. No data is sent to any server, making it completely private and secure.

What is the prefix option for?

Prefixes like "sk_live_" or "pk_test_" help identify token types and environments in your application. Many services like Stripe use prefixed keys to distinguish between live and test credentials.

home/cybersecurity/token-generator

API Key & Token Generator

Generate cryptographically secure API keys, tokens, and secret keys. Uses crypto.getRandomValues() for true randomness. Free, instant, no data leaves your browser.

Token format

Options

Length32

8256

Prefix(optional)

Number of tokens1

120

Cryptographically secure

This tool uses crypto.getRandomValues(), a Web Crypto API that produces cryptographically secure random numbers. Every token is unpredictable and suitable for authentication secrets.

Entropy explained

Entropy measures randomness in bits. A 32-char hex token has ~128 bits of entropy. For API keys, 128+ bits is recommended. For signing secrets, aim for 256+ bits.

Best practices

Use unique tokens per service, store secrets in environment variables, rotate keys periodically, and never commit secrets to version control. Use prefixes to identify key types.

How to Use API Key & Token Generator

The API Key & Token Generator creates cryptographically secure tokens, API keys, and secret keys directly in your browser. Using the Web Crypto API (crypto.getRandomValues()), it produces unpredictable tokens suitable for authentication, authorization, and secure communication. No data leaves your device.

Choose a Token Format

Select from four token formats: Hex produces hexadecimal strings (0-9, a-f), Base64 produces URL-safe base64 encoded output, Alphanumeric uses letters and digits, and Custom lets you define your own character set.

Set Token Length and Prefix

Use the length slider to choose between 8 and 256 characters (default 32). Optionally add a prefix like 'sk_live_' or 'pk_test_' to identify your tokens by type or environment.

Configure Additional Options

Choose case preference (uppercase, lowercase, or mixed), exclude ambiguous characters (0, O, l, 1, I) for readability, and set the number of tokens to generate (1 to 20).

Generate and Copy Tokens

Click Generate to create your tokens. Each token shows its entropy estimation in bits. Copy individual tokens or use Copy All to grab every generated token at once.

Common Use Cases

API Authentication Keys

Generate secure API keys for your web services and REST APIs. Use prefixes to distinguish between production and test environments.

Database Secrets and Encryption Keys

Create strong secret keys for database encryption, JWT signing secrets, and session tokens that meet security best practices.

Webhook Signing Secrets

Generate tokens for webhook signature verification, ensuring that incoming webhook requests are authentic and untampered.

OAuth Client Secrets

Create cryptographically secure client secrets for OAuth2 applications, ensuring your authentication flows remain protected.

Pro Tips

-Use at least 32 characters for API keys and 64+ characters for encryption secrets to ensure sufficient entropy.
-Add prefixes like 'sk_live_' or 'pk_test_' to quickly identify key types and environments in your codebase.
-Exclude ambiguous characters when tokens need to be manually read or typed by humans.
-Base64 format packs more entropy per character than hex, making shorter tokens equally secure.

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