Token Generator
Create secure random tokens for API keys, secrets, and test data right in your browser.
From 1 to 20.
From 8 to 512 characters.
What Does This Token Generator Do?
This token generator creates random tokens in your browser, in the format and length you choose. Pick a token type (hexadecimal, alphanumeric, URL-safe, or numeric), set a length between 8 and 512 characters, decide how many tokens you need (up to 20 at a time), and click Generate Tokens. You can also add your own prefix, such as app_ or test-, so the tokens are easy to recognise later.
Each token is shown in its own box with a character count and an estimated strength in bits, so you can see how strong a token is before you use it. The tool works as a random string generator for API keys, secret keys, test data, invite codes, and any other place where you need an unpredictable value. No sign-up is needed, and the tokens are created on your own device.
How to Use This Token Generator?
- Choose a token type. Select Hexadecimal, Alphanumeric, URL-Safe, or Numeric from the Token Type menu. The line under the menu shows exactly which characters that type can contain.
- Set the token length. Type a number from 8 to 512, drag the slider, or tap one of the preset buttons (16, 32, 64, 128, or 256). The default is 32.
- Pick how many tokens you need. Enter any number from 1 to 20 in the Number of Tokens field.
- Add a prefix if you want one. Enter up to 32 characters using letters, numbers, and the symbols . _ : – to label your tokens, for example app_ or live-.
- Adjust the extra options. Hexadecimal tokens can be switched to uppercase. Alphanumeric and URL-safe tokens can exclude look-alike characters (0, O, 1, l, I).
- Click Generate Tokens. Your tokens appear below, each with a Copy button. Use Regenerate for a fresh batch with the same settings, Copy All to grab every token at once, Download .txt to save them, or Clear to remove them from the page.
Token Generator Features
Four Token Types
Generate hexadecimal, alphanumeric, URL-safe, or numeric tokens. The allowed characters for the selected type are always shown under the menu.
Flexible Length Control
Set any length from 8 to 512 characters using the number box or the slider, or jump straight to a 16, 32, 64, 128, or 256 character preset.
Bulk Generation
Create up to 20 tokens in one click. Every token is generated independently, so no two tokens in a batch are related to each other, ensuring greater flexibility and security.
Optional Prefix
Add a prefix of up to 32 characters to every token. It is placed in front of the random part and is not counted in the token length or the strength estimate.
Copy, Copy All and Download
Copy a single token, copy a whole batch with a new line, comma, or space between tokens, or download everything as a tokens.txt file with one token per line.
Uppercase and Look-Alike Options
Switch hexadecimal output to uppercase, or remove the easily confused characters 0, O, 1, l, and I from alphanumeric and URL-safe tokens for easier reading and copying.
Are the Generated Tokens Really Random?
Yes. The tool does not use Math.random, which is not meant for security work. It asks your browser’s built-in secure random number generator (the Web Crypto API) for random bytes, and it builds every token from those bytes. If your browser does not support this feature, the tool shows a message and turns the Generate button off instead of quietly falling back to a weaker method.
The tool also avoids a subtle problem called modulo bias. When 256 possible byte values are squeezed into a character set whose size does not divide evenly into 256, some characters would appear slightly more often than others. To prevent that, the generator discards any byte that would cause an uneven spread, so every character in the chosen set has exactly the same chance of appearing in every position.
How Token Generation Works
A good random token is just a long run of characters chosen without any pattern. This tool creates each one in two steps.
Choosing the Characters
The token type you select defines the pool of allowed characters. Options such as uppercase hex or removing look-alike characters change that pool before anything is generated. The browser then supplies secure random bytes, and each usable byte picks one character from the pool.
Building the Token
Characters are collected until the token reaches the length you asked for. Your prefix, if any, is placed in front. The tool then estimates strength by multiplying the length by the number of bits each character carries, and shows the result as “about X bits”.
The strength shown under each token is based only on the random part. A prefix such as app_ makes a token easier to recognise, but it adds no security because anyone can guess it.
Is It Safe to Generate Tokens Online?
It depends on how the tool is built. Some online generators create the token on a server and send it to you, which means a copy could be logged or intercepted along the way. That is not a good place for a value that is supposed to stay secret.
This tool creates every token inside your own browser with JavaScript. The tokens are held only in the page’s memory while you look at them, and they disappear when you click Clear or close the page. Nothing in the tool sends your settings or your tokens anywhere, and you do not need an account. For extra care, treat any token that is shown on screen the way you would treat a password: copy it straight to the place it belongs and avoid pasting it into chats or shared documents.
Which Token Type Should You Choose?
The four types differ in which characters they use. That affects how compact a token is, where it can be safely placed, and how much strength each character adds.
| Token Type | Characters Used | Bits per Character | Good Fit For |
|---|---|---|---|
| Hexadecimal | 0-9 and a-f (or A-F) | 4 | Secret keys, IDs, values that must be hex |
| Alphanumeric | A-Z, a-z, 0-9 | About 5.95 | API keys, access tokens, general purpose secrets |
| URL-Safe | A-Z, a-z, 0-9, hyphen, underscore | 6 | Tokens placed inside links and query strings |
| Numeric | 0-9 | About 3.32 | Codes, PINs, reference numbers |
If the token will appear in a web address, the URL-safe type is the simplest choice because none of its characters need special encoding. If you are not sure, a 32 character alphanumeric token is a sensible starting point. For anything that includes unusual symbols, you can check how they behave in a link with our URL Encoder Decoder.
How Long Should a Token Be?
Length matters more than anything else. Each extra character multiplies the number of possible tokens, which makes guessing impractical. The table below shows the strength estimate the tool displays for common lengths when no options are changed.
| Token Type | 16 Characters | 32 Characters | 64 Characters |
|---|---|---|---|
| Hexadecimal | 64 bits | 128 bits | 256 bits |
| Alphanumeric | 95 bits | 190 bits | 381 bits |
| URL-Safe | 96 bits | 192 bits | 384 bits |
| Numeric | 53 bits | 106 bits | 212 bits |
As a general rule, tokens that protect something important should offer at least 128 bits, which is why 32 hexadecimal characters is a common choice. Numeric tokens carry fewer bits per character, so they need to be noticeably longer to reach the same strength. Excluding look-alike characters makes the character pool slightly smaller, so the bit estimate will be a little lower than the figures above.
Common Reasons to Generate Random Tokens
API Keys and Secrets
Developers often need a fresh API key, signing secret, or webhook secret for a new project. A prefix such as live_ or test_ helps tell environments apart at a glance.
Verification and Reset Links
Email confirmation and password reset flows rely on long, unguessable strings placed in a link. URL-safe tokens fit this job because they need no extra encoding.
Test Data and Placeholders
When filling a database or writing documentation, a batch of up to 20 random tokens saves you from inventing values by hand and keeps your workflow running smoothly. Copy All with a comma or new line separator makes pasting quick.
Invite and Reference Codes
Short numeric or alphanumeric codes work well for invitations, coupons, and order references. Turning on the look-alike filter avoids mix-ups between 0 and O or 1 and l when people read codes aloud or type them by hand.
Token, Password or Hash: What Is the Difference?
These three terms are often mixed up. A token is a random value that a system checks for an exact match, such as an API key or a reset code. A password is something a person creates or remembers and types in to prove who they are. A hash is a fixed-length fingerprint produced from some input, and it is not random at all, because the same input always gives the same result.
If you need a value for a person to remember or type regularly, our Password Generator is the better fit. If you want to turn existing text into a fingerprint, use the Hash Generator. Use this tool when you need a standalone random value that nobody can guess.
Tips for Generating and Using Tokens
Match the Length to the Risk
Use the bit estimate under each token as a guide. Short tokens are fine for throwaway test data, but secrets that protect real accounts or services should be much longer.
Keep Prefixes Simple
The prefix field accepts letters, numbers, and the symbols . _ : – only. If you enter anything else, the tool shows an error and waits for you to fix it before generating.
Store Secrets Safely
Save generated secrets in a secure environment variable or a trusted password manager rather than in source code or public repositories. A strong token is only useful if it stays private and protected from unauthorized access.
Download Before You Clear
Clear removes every token from the page and nothing is kept afterwards. Copy or download the tokens you need first. You can also check how strong an existing secret is with our Password Strength Checker.
Frequently Asked Questions
How do I generate a random token online for free?
Choose a token type, set the length and the number of tokens, then click Generate Tokens. Your tokens appear straight away and can be copied or downloaded. No account or payment is needed.
What is a token generator used for?
A token generator creates random strings that are hard to guess. People use them for API keys, secret keys, verification links, invite codes, session identifiers, and test data.
Are the tokens cryptographically secure?
Yes. The tool uses your browser’s secure random number generator instead of Math.random, and it filters out biased values so every character has an equal chance of being chosen.
Are my tokens stored or sent to a server?
No. Tokens are generated inside your browser and exist only in the page while you view them. Nothing is uploaded, and clearing the results or closing the page removes them.
What token types can I generate?
You can generate hexadecimal tokens (0-9 and a-f), alphanumeric tokens (A-Z, a-z, and 0-9), URL-safe tokens (alphanumeric plus hyphen and underscore), and numeric tokens (0-9 only).
What is the maximum token length?
Tokens can be anywhere from 8 to 512 characters long. The preset buttons offer 16, 32, 64, 128, and 256, and you can type any whole number in between.
How many tokens can I create at once?
You can create between 1 and 20 tokens in each batch. Click Regenerate to get a new batch with the same settings.
How long should an API token or secret key be?
A common recommendation is at least 128 bits of randomness. In this tool that means 32 hexadecimal characters, or about 22 or more alphanumeric characters. Longer is better when the token protects something sensitive.
What does the prefix option do?
It adds your own text, up to 32 characters, in front of every token. This is handy for labelling tokens by project or environment. The prefix is not counted in the token length or in the bit estimate.
Which characters are allowed in the prefix?
Letters, numbers, and the symbols . _ : – are allowed. Spaces and other symbols are rejected with an error message.
What does “exclude similar characters” mean?
When switched on, the characters 0, O, 1, l, and I are removed from the pool. This makes tokens easier to read and type by hand. The option is available for alphanumeric and URL-safe tokens.
Can I generate uppercase hexadecimal tokens?
Yes. When the hexadecimal type is selected, an Uppercase letters checkbox appears. Turning it on produces tokens that use A-F instead of a-f.
How do I copy or save all my tokens?
Use Copy All to place every token on your clipboard, separated by a new line, comma, or space depending on your choice. You can also click Download .txt to save them as a file with one token per line.
What does the bits value under each token mean?
It is an estimate of how many random bits are in the token, calculated from the token length and the size of the character pool. A higher number means more possible combinations and a harder token to guess.
Does this tool work on mobile devices?
Yes. The layout adjusts to smaller screens, and every control, including the slider, presets, and copy buttons, can be used by touch.