Cron AI
Cron AI turns a plain-English description of a schedule into a working cron expression. Type a frequency, press one button, copy the result. It is free, requires no account, fits on a single page, and publishes its source code openly.
What is Cron AI?
Cron AI is a single-purpose web utility that converts a schedule described in ordinary English into the cron expression that encodes it. The problem it addresses is narrow and familiar: cron syntax packs minute, hour, day of month, month and day of week into five terse fields, and most people who need it reach for it too rarely to remember the order, let alone the step and range operators. Rather than reopening the manual, a visitor types what they want — the input suggests phrasings such as every hour, every day or every 3 months — and presses a single button labelled Done.
The entire product is one page. There is no navigation, no second screen and no internal link of any kind: a heading, the subtitle Words to cron expression, the prompt I want a Cron job that runs:, one input and one button. No account is created, no email is collected and no payment is requested. The generation itself is delegated to a language model; the project README states that it uses OpenAI's text-davinci-003.
This is a personal project rather than a commercial product. It was built by Luis Rodriguez, a software engineer based in Belize, who publishes the full source on GitHub under the handle rodgetech: a Next.js and Tailwind CSS application carrying 187 stars, 24 forks and 40 commits, though the repository holds no licence file. That openness supports a second way of using it, and the README documents it — clone the project, supply your own OpenAI API key in a local environment file, and run it on localhost.
What the site does not provide is equally defining. There are no terms of service, no privacy policy, no legal notice, no pricing page and no published email address, and it lives on a free Vercel subdomain first captured by the Wayback Machine on 30 January 2023. The footer points only to the author's X account, the repository, and a second project of his, Screen Mockups. It is a small, free, deliberately unadorned tool, and it presents itself as nothing more.
What it does
- Turn a frequency written in plain English into a cron expression
- Produce a valid-looking schedule without memorising the five cron fields
- Copy the result straight into a crontab or a scheduler configuration
- Work without creating an account, signing in or supplying an API key
- Check the syntax that corresponds to a phrasing you already have in mind
- Start from suggested wordings such as every hour, every day or every 3 months
- Run the same tool locally from its published source code
When to use Cron AI / When not to
A quick filter to help you decide if Cron AI is the right fit.
When to use Cron AI
- Developers who need a cron schedule only occasionally and would rather not reopen the syntax reference
- System administrators and DevOps engineers writing crontab entries under time pressure
- Data engineers setting the cadence of recurring pipeline, backup or ETL runs
- Newcomers learning cron who want to see how an ordinary sentence maps onto five fields
- Self-hosters who want a small open-source Next.js app they can run with their own OpenAI key
When not to use Cron AI
- Teams looking for a scheduler that actually runs jobs, since this tool only writes the expression
- Organisations that require contractual guarantees: no terms of service, privacy policy or DPA exists
- Anyone entering confidential or regulated wording, because nothing documents where the input goes
- Users who expect the output to be explained, validated or previewed as a list of upcoming run times
- Buyers who need support, an availability commitment or an identifiable vendor to hold accountable
How to use Cron AI
A typical end-to-end flow, from setup to results.
- Open the site directly in a browser — there is no sign-up step and no key to obtain
- Read the prompt above the field, which reads: I want a Cron job that runs:
- Type the frequency you need in plain English, for example every hour or every 3 months
- Note that the Done button stays disabled until the field contains something
- Press Done to send the wording for generation
- Read the cron expression returned on the page
- Check it against your own understanding of the schedule before relying on it
- Copy it into your crontab, scheduler or platform configuration
- To self-host instead, clone the GitHub repository linked in the footer
- Add your own OpenAI API key to a local .env.local file, run pnpm install then pnpm dev, and open localhost:3000
Pros & Cons
Pros
- Free and immediate, with no account, no key and no configuration
- Minimal interface: one thing to do, and no learning curve at all
- Removes a trip to the cron documentation for an occasional need
- Source code is public, so the behaviour can be inspected rather than assumed
- Can be self-hosted, which puts the whole chain under the user's own control
- Collects no account data: no email, no password, no payment details
- Loads as a single static page, so it is quick to reach and quick to leave
Cons
- No legal pages whatsoever: no terms, no privacy policy, no legal notice
- No published email address, so there is no contact route on the site itself
- The generated expression is neither explained nor validated on screen
- The documented model, text-davinci-003, belongs to an early OpenAI generation
- No availability commitment: a personal project on a free Vercel subdomain
- Support exists only through the GitHub repository or the author's X account
- English-only interface, and the author's own domain cited in the README is now parked and for sale
Pricing & Plans
The hosted tool is free of charge. The site publishes no pricing page, no amount and no payment form, and access requires neither an account nor a subscription, so there is no lowest price point to state. The only indirect cost arises on the self-hosting route, which requires the operator to supply an OpenAI API key and to bear OpenAI's own usage charges.
Data, GDPR & hosting
A consolidated view of how Cron AI handles your data.
GDPR overview
There is no mention of the GDPR anywhere on this site. It publishes no privacy policy, no cookie banner, no consent request and no legal notice; it names no data controller, designates no Article 27 representative, and exposes no data protection contact — an enumeration of the page returned no email address at all. No processing agreement and no subprocessor list are published, even though the source repository shows that submitted text is sent to a third-party model provider. The tool is published by an individual based in Belize, outside the European Union, and served from Vercel infrastructure. For a free personal utility that holds no account this is unsurprising, but an organisation subject to the GDPR has no documentation to rely on and no counterparty to contract with.
Who owns the data?
No terms and conditions exist on this site, so nothing states who owns the text typed into the field or the expression returned. There is no privacy policy, no legal notice and no published contact address, which means no document assigns rights over either side of the exchange. The repository indicates that generation is delegated to OpenAI's API, so the wording submitted leaves the page and reaches a third-party provider under terms this site never mentions. In practice a cron expression is a short technical string of little proprietary value, but the silence is worth naming plainly: ownership, reuse and disclosure here are undefined rather than settled in the user's favour.
Reuse rights
Nothing on the site restricts what a visitor may do with the cron expression it returns. No terms grant or withhold rights, so there is no permission to request and no licence to comply with: a generated schedule can be pasted into a crontab, a script or a platform configuration without asking anyone. The same silence cuts the other way. The site never says what becomes of the wording submitted, whether it is logged, or whether the third-party model provider retains it. Reuse of the output is therefore unencumbered in practice, while the treatment of the input is left entirely undocumented, and a user who needs a written answer on that point will not find one here.
Data retention & training
Hosting summary
The site declares no hosting jurisdiction. It publishes no privacy policy, no trust or security page and no subprocessor list, so no country or region is stated for any processing. What can be measured rather than read: the host name resolves to 216.198.79.3, an address geolocated in the United States on Amazon's AS16509 and identified as anycast, which is characteristic of a Vercel edge network. An anycast address indicates a point of presence, not a place where data is stored, and it should not be read as a storage location. The product itself keeps no account and no history, so there is no user data store on its side to locate. Generation is delegated to a third-party model provider according to the source repository, with no region specified. In short, hosting is undeclared, and the only geographic signal available is a network measurement that deliberately says little.
Things to keep in mind
Risks and trade-offs to weigh before adopting Cron AI.
- Never type confidential, internal or personal wording into the field: no policy governs where it goes
- The input is sent to a third-party model provider, and no document on the site covers that transfer
- Always verify the expression before production — a wrong field can silently run a job hourly instead of monthly
- Trusting a generated schedule without understanding cron leaves you unable to debug it when it misfires
- Convenience can quietly erode a skill worth keeping: reading cron syntax is a five-minute thing to learn
- There is no support, no SLA and no contact address, so a failure at the wrong moment has no remedy
- A free personal subdomain can go offline without notice; do not build a routine that assumes it will be there
Setup & Integrations
Technical difficulty
None for the hosted version: open the page and type. There is no installation, no account, no API key and nothing to configure, which puts it within reach of anyone who can use a browser. Self-hosting is a different matter and assumes developer habits — a Node version set by the repository's .nvmrc, a pnpm install, an OpenAI API key placed in a .env.local file, then pnpm dev to serve it on localhost. That path is straightforward for a working developer and out of reach for everyone else.
Deployment
Integrations
Supported languages
Behind Cron AI
Resources
All the official URLs gathered for verification and reference.
Frequently asked questions
What does Cron AI actually do?
Do I need an account to use it?
How much does it cost?
Which model generates the expression?
Does it run my scheduled task for me?
Can I host it myself?
Is there a privacy policy?
Is there an API or a mobile app?
Who is behind the tool?
How can I reach the author?
Should you pick Cron AI?
Cron AI does one small thing and does it without friction. Describe a frequency in ordinary English, press a button, and a cron expression comes back — no account, no payment, no configuration and no second screen. For an occasional need, that is genuinely the shortest path between remembering that cron exists and having a line you can paste, and the absence of everything else is the point rather than an oversight.
The same minimalism sets its limits, and they are worth stating plainly. There are no terms of service, no privacy policy and no legal notice; no email address is published; nothing on the page documents what happens to the words submitted, even though the repository shows they are sent to a third-party model provider. The tool does not explain, validate or preview the expression it returns, so verification stays with the user. It is a personal project on a free subdomain, built by a developer in Belize, with no availability commitment and a documented model from an early OpenAI generation. None of that is hidden — it simply means the tool belongs to personal and ad hoc use, not to a regulated or contractual setting.
Two things make it more solid than a throwaway page. The source code is public, so the behaviour can be inspected rather than trusted, and the same project can be run locally with your own API key if the hosted version disappears or you would rather keep the chain in-house. Judged as what it is — a free utility that spares you a trip to the cron manual — it is a fair deal. Judged as a service to depend on, it offers nothing to depend on, and it never claims otherwise.
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