Token Generator — API Keys & Secrets
Generate random tokens, API keys, and secrets with configurable length, charset, and optional prefix.
How it works
- 1Configure your options above
- 2Click "Generate Token" — processing happens in your browser
- 3Copy or download the result
What to do next
About Token Generator
Token Generator handles a focused step in the modern developer utility workflow. Generate random tokens, API keys, and secrets with configurable length, charset, and optional prefix. The page loads with the upload area, controls and result panel all visible at once, so the path from "I have a file" to "I have the result" is one screen long.
Reach for Token Generator when you need a predictable result on a single file. The page works on the first visit, the controls are visible without a menu, and the output is delivered the moment the engine finishes.
Token Generator performs the transformation entirely inside the JavaScript runtime. Your file lives in the tab's memory while the engine works on it; the result lives in the tab's memory until the browser triggers the download. Both are released when the tab closes, the way every browser tab releases its memory.
Behind the controls you see, standard browser APIs is doing the actual developer utility. Formats are detected on load and the engine produces a deterministic output for any given input + options combination — useful when you need to re-run a job and expect identical results.
The hard constraints are easy to remember. Maximum input: 0 MB. Multiple files per run: no — one input at a time, by design, to keep results predictable. The same controls apply on every run.
If you fit any of these descriptions, Token Generator should slot cleanly into your workflow: QA engineers writing repro cases; students learning new languages; engineers debugging API payloads. The tool keeps the controls focused on what matters for each of these use cases.
The output handed back by Token Generator is the output file. If you would prefer to keep the result in the browser instead of downloading it, you can copy it from the result panel and paste it directly into another tab — useful when the next tool in your workflow expects pasted text rather than a file.
Token Generator is intentionally narrow in what it does, which makes it easy to slot into a longer workflow. Take its output, hand it to whichever next tool fits the job, and Token Generator stays out of your way until the next time you need it.
Token Generator keeps the control set focused. Every option on the page is there because a real workflow needs it, and the defaults aim at the most common case so a first-time user can get the right output without changing any settings.
Some context on why Token Generator exists in this form: modern File APIs, high-performance JavaScript engines, and well-maintained open-source libraries now make it possible to perform developer utility work entirely in the browser. Token Generator is built on top of that capability, which is why a single page can host the full pipeline.
As a single-page tool, Token Generator stays focused on one developer utility step. Multi-step workflows are composed by chaining adjacent tools — each tool produces a standard file the next one can read directly, so a longer pipeline is just a sequence of short tab-and-tab visits.
Useful patterns when working with Token Generator: keep the input file open in another tab so you can compare against the result; give the output file a descriptive name when saving so you can find it later (the default name is sensible but generic); and treat each run as independent — the tool has no concept of "history", which means you cannot accidentally pollute one job with leftovers from another.
If Token Generator appears to hang, the engine is almost certainly still working — large inputs simply take longer to process inside a browser than they would on a server with multi-core scheduling. For inputs near the 0 MB cap, give it up to a minute on a typical laptop before assuming something is stuck.
Open the workspace above to start using Token Generator. The engine loads on the first interaction so the page itself stays light, and once the tool is warm it processes subsequent jobs quickly. The moment the page is interactive, the tool is ready to do real work on your file.
How it works
- 1Reach the Token Generator page in your browser to begin.
- 2Drop a developer file onto the upload area, or click to pick one from your device.
- 3Pick any non-default settings you need. Most users leave the defaults alone for the first run and only revisit if the result needs tuning.
- 4Click to start the job. The engine (standard browser APIs) processes the input in the page; you can watch the progress indicator until it completes.
- 5Download the result. The file is generated in your browser and saved through your normal download flow.
- 6Re-run with different settings as often as you want. Each run produces a fresh output and the original file on disk is never modified.
Common use cases
- Hash a string for a quick reproducibility check using Token Generator.
- Compare two API responses to spot a regression.
- Validate a config blob before pushing to staging.
- Generate a quick fixture without leaving the browser.
- Pretty-print a minified blob during incident triage.
- Encode binary content for transport in a JSON body.
- Inspect a regex against a test string before committing it.
- Decode a token to confirm its claims during a debugging session.
- Format a noisy log line into something a teammate can read.
- Inspect a payload during local development without writing a script.
FAQ
Are generated tokens secure?
Yes — the tool uses crypto.getRandomValues for cryptographically secure random number generation in the browser.
What character set should I choose?
Hex is standard for secrets and hashes. Base64url is compact and URL-safe. Alphanumeric avoids special characters that might need escaping.
Can I add a prefix like sk_live_?
Yes — enter any prefix in the optional prefix field. It will be prepended to each generated token without counting toward the token length.
How long should my token be?
For API keys, 32+ characters in hex (128 bits) is a common minimum. For high-security secrets, use 64+ characters.
Is my token stored?
No — generation is 100% local in your browser. Nothing is sent to any server.
Can I generate multiple tokens at once?
Yes — set the count to generate up to 50 tokens in a single batch.
Can I self-host Token Generator for my team?
Token Generator is a static page running an open-source engine in your browser, so a typical corporate firewall does not get in the way as long as it allows JavaScript to load from Favtoo. For teams that need to host it themselves on an internal network, the underlying engine (standard browser APIs) is open-source and can be packaged into a private build with the same behaviour. Reach out via the Contact page if that is something you are exploring.
How fast is Token Generator?
Most jobs finish in seconds. Speed scales with input size and with how many CPU cycles your browser tab has available — the engine runs in your browser, so it shares resources with whatever else you have open. For inputs near the 0 MB ceiling, expect anywhere from a few seconds to roughly a minute on a typical laptop. Closing other heavy tabs noticeably speeds things up.
Can I process multiple files at once with Token Generator?
Token Generator processes one input at a time by design — it keeps memory usage predictable on lower-end devices and makes results easier to verify. To handle a folder, run the tool once per file; the page stays loaded between runs and remembers your last-used settings, so the second run is essentially instant.
Will Token Generator ask me to pay to download the result?
Token Generator is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.
Does Token Generator reduce quality of the result?
Token Generator is built to preserve quality wherever the underlying developer format allows it. Operations that are mathematically lossless (e.g. structural transformations, lossless re-encoding) round-trip with no perceptible change. Operations that involve a lossy codec inevitably introduce small artefacts at the byte level, but the defaults aim at the sweet spot where output looks or sounds the same to a normal viewer or listener while still being meaningfully smaller or faster than the input.
Why is my browser prompting me when I open Token Generator?
Token Generator only needs the standard web platform — file picker access for the inputs you choose to load, and optionally clipboard access if you copy the result rather than downloading it. There is no microphone, camera, geolocation or background-permission request, because none of those are needed for the work the tool does.
What input formats are supported by Token Generator?
The accepted formats are listed in the upload area on the tool itself. If your input is in a format that is not directly supported, convert it first using one of Favtoo's converter tools — every Favtoo converter outputs a file that is a clean input to the next tool in the chain.
Can I call Token Generator from a script?
Token Generator is a browser-only tool by design and does not expose a hosted API. The reason is the same as the privacy story: there is no Favtoo backend doing the work, so there is no service to call. If you need to script the same transformation, the underlying engine (standard browser APIs) is open-source and can be used directly from your own code.
How do I know I am using the latest version of Token Generator?
Token Generator is updated whenever the underlying engine releases an improvement or a bug fix. Because the tool is delivered as a static page, every visit fetches the latest version automatically — there is no "version" to manage on your end. If a particular release ever changes default behaviour, the change is documented on Favtoo's changelog so you can confirm what shifted.