Sitemap XML Generator
Generate valid sitemap.xml from a list of URLs with change frequency, priority, and last-modified date.
How it works
- 1Configure your options above
- 2Click "Generate" — processing happens in your browser
- 3Copy or download the result
What to do next
About Sitemap XML Generator
Sitemap XML Generator is a self-contained developer utility workspace. Generate valid sitemap.xml from a list of URLs with change frequency, priority, and last-modified date. Open the page, get the result, close the tab — that is the entire workflow.
Technically, the work is done by standard browser APIs, loaded as part of the page. Inputs are recognised automatically and validated before the engine begins processing. Files up to 0 MB are supported per run; that ceiling keeps browser memory usage stable on a wide range of devices.
Sitemap XML Generator runs the entire transformation inside your browser. The file is read by JavaScript running in the page, processed in-memory by standard browser APIs, and written back as a download. The browser is the runtime; the page is the interface. You can confirm what the tool does by opening the developer-tools Network tab during a run — the only requests are for the page's own static assets.
Anyone who works with developer utility on a casual basis — data analysts wrangling JSON, devops engineers crafting one-liners, frontend developers prepping fixtures — finds Sitemap XML Generator a quick way to get the result. The page loads in under a second, the controls are visible from a single screen, and the result downloads or copies in one click.
Most people land on Sitemap XML Generator via a search at the moment they actually need the tool. That shapes the design: the page is a single screen with the input on one side, the controls in the middle, and the result on the other, so a first-time visitor can complete the job without reading documentation.
The architecture imposes only the limits the browser itself imposes. The published 0 MB ceiling is conservative; most modern devices comfortably handle inputs up to that size, and the cap exists so the tool degrades gracefully on phones and budget laptops rather than running out of memory.
As a workflow component, Sitemap XML Generator is the part you reach for when a single, well-defined developer utility step needs to happen. It performs that step and returns a standard file you can carry into the next part of your pipeline.
Sitemap XML 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.
Sitemap XML Generator returns the result as a download. If you are running multiple jobs, the output names will not collide as long as the input names differ. You can re-run with different settings as many times as you like; each run produces a fresh file with no caching trickery in between.
A short note on how Sitemap XML Generator came to look the way it does: every iteration started by watching how someone unfamiliar with the tool actually used it, then removing whatever got in their way. That is why the upload area dominates the screen, the run button is bigger than the secondary controls, and the result panel is unmissable when the job finishes.
Sitemap XML Generator produces deterministic output: the same input plus the same options always produces the same result. That predictability matters when the result has to match an upstream specification or be reproducible later.
Tips from users who reach for Sitemap XML Generator regularly: process one input first to confirm the settings produce what you expect before committing to a batch; treat the page as the working surface and avoid leaving large jobs running in a backgrounded tab where the browser may throttle JavaScript; and if a particular file fails, check whether the source is intact by opening it in its native viewer — most "tool errors" are actually input errors.
Common gotchas worth flagging: the supported formats are listed in the upload area. The 0 MB ceiling is per-file, not per-session; you can run as many separate jobs as you like, but a single oversized input will be rejected on load.
Sitemap XML Generator is one of many single-purpose tools in the catalog. Each is built around the same single-page model. Use this one, close the tab, and come back the next time you need the same job done. None of the tools require prior knowledge of the others — each page is self-contained.
How it works
- 1Open the Sitemap XML Generator workspace above. The interface is a single page, so there is nothing to navigate.
- 2Drop a developer file onto the upload area, or click to pick one from your device.
- 3Tweak the controls if the defaults are not quite right for your input. The options are kept short and labelled in plain language.
- 4Trigger processing. standard browser APIs reads your input, applies the transformation, and writes the result back into the page.
- 5Save the output when it is ready.
- 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
- Generate boilerplate from a single specification line using Sitemap XML Generator.
- Validate a config blob before pushing to staging.
- Pretty-print a minified blob during incident triage.
- Generate a quick fixture without leaving the browser.
- Hash a string for a quick reproducibility check.
- Inspect a regex against a test string before committing it.
- Inspect a payload during local development without writing a script.
- Compare two API responses to spot a regression.
FAQ
What is a sitemap.xml?
An XML file that lists all URLs on your website, helping search engines discover and index your pages more efficiently.
How do I submit my sitemap?
Add it to your robots.txt (Sitemap: https://yoursite.com/sitemap.xml) or submit directly in Google Search Console and Bing Webmaster Tools.
What is changefreq?
A hint to search engines about how often the page content changes: always, hourly, daily, weekly, monthly, yearly, or never.
What is priority?
A value from 0.0 to 1.0 indicating relative importance of pages within your site. Default is 0.5.
URL limit?
Sitemaps support up to 50,000 URLs and 50MB uncompressed. For larger sites, use a sitemap index.
Private?
Yes — generated locally.
Will Sitemap XML Generator keep working if my Wi-Fi drops mid-task?
Once the page is loaded, Sitemap XML Generator can complete jobs without an active internet connection — the engine is bundled with the page, so there is no per-job network call. The initial page load does require a connection (to fetch the static assets), but after that you can disconnect entirely and the tool will still work. This is a side-effect of the local-first architecture, not a deliberate "offline mode" feature.
Can I use Sitemap XML Generator on iOS or Android?
Sitemap XML Generator runs in any modern mobile browser — Safari, Chrome, Firefox and the in-app browsers in most messaging apps all support the underlying APIs. Performance depends on the device: a recent phone handles typical inputs nearly as fast as a laptop, while older devices may take a few seconds longer near the 0 MB ceiling. The interface lays out cleanly on small screens, so you do not need to pinch-zoom to see the controls.
Is there a programmatic version of Sitemap XML Generator?
Sitemap XML 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.
Is Sitemap XML Generator lossless?
Sitemap XML 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.
Does Sitemap XML Generator match what professional tools produce?
Sitemap XML Generator is built on standard browser APIs, which is the same class of engine used by professional developer utility pipelines. For deterministic operations, the output is byte-identical to what an equivalent CLI run would produce; for operations involving a codec or a model, the result is well within the range of what comparable tools generate. If you have a specific reference output you need to match, run a small test job first to confirm the configuration produces what you expect.
Are there any usage limits on Sitemap XML Generator?
Inputs are capped at 0 MB per file, which keeps memory usage stable across phones, tablets and older laptops. You can run Sitemap XML Generator as often as you need; every run produces a full-quality result.
Is there a desktop version of Sitemap XML Generator?
No installation is needed. Sitemap XML Generator runs as a normal web page, with no browser extension, no native helper, and no separate desktop client to download. That is partly a privacy choice — extensions can request broad permissions, while a regular page is sandboxed by default — and partly a convenience one: you can use Sitemap XML Generator on any computer you have temporary access to without leaving anything installed on it.
Why did Sitemap XML Generator reject my input?
Failures usually fall into one of three buckets: the input is in an unsupported format, the input is over the size cap, or the input is structurally malformed (a truncated download, a partial export, or a stream the engine does not recognise). The first two are easy to confirm — check that your file is in a supported format and that it is below 0 MB. For the third, opening the file in its native viewer first is the fastest way to confirm the source is intact.
How often is Sitemap XML Generator updated?
Sitemap XML 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.