HTTP Status Code Reference
Complete reference of HTTP status codes with descriptions — 1xx informational through 5xx server errors.
How it works
- 1Configure your options above
- 2Click "Generate" — processing happens in your browser
- 3Copy or download the result
What to do next
About HTTP Status Code Reference
HTTP Status Code Reference is a single-page tool for the common developer utility task it is named after. Complete reference of HTTP status codes with descriptions — 1xx informational through 5xx server errors. The interface keeps the input on one side, the configurable options in the middle, and the result on the other side. Most jobs start and finish without any scrolling.
Anyone who works with developer utility on a casual basis — QA engineers writing repro cases, backend developers inspecting requests, frontend developers prepping fixtures — finds HTTP Status Code Reference 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.
HTTP Status Code Reference 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.
From a technical standpoint, HTTP Status Code Reference is JavaScript and standard browser APIs running in your tab. The browser is the runtime; the page is the interface. Maximum input size: 0 MB per run.
HTTP Status Code Reference works well as a bookmarked utility you reach for when you need it. The first visit shows you what the tool does; the second is when you realise it is a low-friction option for the task and worth keeping in your tab list.
If your task needs more than one step, chain HTTP Status Code Reference with HTTP Header Analyzer, cURL to Code Converter, and API Response Formatter. Each tool produces output that is a clean input to the next, so multi-step workflows are just a matter of opening the next tool in a new tab and continuing.
HTTP Status Code Reference 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 practical note on limits: HTTP Status Code Reference accepts inputs up to 0 MB per run, and the tool processes one input at a time to keep memory usage predictable. If you ever bump into the ceiling, the cause is the size of the input.
HTTP Status Code Reference is honest about scope: it handles a single, well-defined developer utility step. Specialist edge-case work — uncommon formats, very large inputs, or pipelines that need scripting — is what dedicated desktop apps are for. This page handles the common case quickly.
A short note on how HTTP Status Code Reference 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.
A few practical tips that experienced users of HTTP Status Code Reference pick up over time. First, keep your default browser updated — the engine relies on standard web APIs and newer browser versions are noticeably faster than ones from a few years ago. Second, close other heavy tabs before processing a large input; the engine shares CPU and memory with whatever else is open. Third, if you re-run the same kind of job often, your last-used settings are remembered for the rest of the tab session, so subsequent runs are essentially one click.
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.
As a single-page tool, HTTP Status Code Reference 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.
HTTP Status Code Reference 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 HTTP Status Code Reference workspace above. The interface is a single page, so there is nothing to navigate.
- 2Select the developer file you want to process — drag-and-drop and the file picker both work.
- 3Adjust the options to match what you need. Sensible defaults cover the most common case, so you can usually skip this step.
- 4Trigger processing. standard browser APIs reads your input, applies the transformation, and writes the result back into the page.
- 5Grab the output as soon as the run completes. You can also copy the result instead of downloading if the next tool in your workflow accepts pasted input.
- 6Run additional jobs as needed. The same controls and defaults apply on every run.
Common use cases
- Inspect a regex against a test string before committing it using HTTP Status Code Reference.
- Convert between data formats while wiring up an integration.
- Encode binary content for transport in a JSON body.
- Generate a quick fixture without leaving the browser.
- Hash a string for a quick reproducibility check.
- Validate a config blob before pushing to staging.
- Generate boilerplate from a single specification line.
- Pretty-print a minified blob during incident triage.
- Format a noisy log line into something a teammate can read.
FAQ
What are HTTP status codes?
Three-digit codes returned by a server in response to an HTTP request, indicating whether the request was successful, redirected, or encountered an error.
What is the difference between 301 and 302?
301 is a permanent redirect (search engines update their index), 302 is a temporary redirect (search engines keep the original URL).
What does 418 mean?
418 I'm a Teapot is an April Fools' joke from RFC 2324 (Hyper Text Coffee Pot Control Protocol). Some APIs use it as an easter egg.
When should I use 401 vs 403?
401 means authentication is required (the user is not logged in). 403 means the user is authenticated but does not have permission.
What is 429?
429 Too Many Requests means the user has been rate-limited. The response may include a Retry-After header.
Private?
Yes — reference generated locally.
Which file formats does HTTP Status Code Reference accept?
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.
Which browsers are supported by HTTP Status Code Reference?
HTTP Status Code Reference works in any modern browser released in the last few years — Chrome, Edge, Firefox, Safari, Brave, Arc and the major Chromium derivatives are all supported. The underlying engine relies on widely-supported web APIs, so there is nothing exotic to install. If you are on a very old browser version and the tool fails to load, updating to the latest release of your preferred browser is the only fix needed.
What permissions does HTTP Status Code Reference need to function?
HTTP Status Code Reference 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.
Can I use HTTP Status Code Reference for commercial work?
HTTP Status Code Reference can be used for personal and commercial work alike — there is no separate "business" licence to purchase. The output you generate is yours to use however you want, including in client deliverables, internal documents, or commercial products. Favtoo's only ask is fair, individual use; the tool is not designed to be embedded as a backend service or wrapped behind an API for resale.
What does the error message in HTTP Status Code Reference mean?
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.
Is there a desktop version of HTTP Status Code Reference?
No installation is needed. HTTP Status Code Reference 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 HTTP Status Code Reference on any computer you have temporary access to without leaving anything installed on it.
Will HTTP Status Code Reference keep working in a year?
HTTP Status Code Reference 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.
How accessible is the HTTP Status Code Reference interface?
HTTP Status Code Reference uses native HTML controls wherever possible, which means keyboard navigation, focus rings, and screen-reader labels work the way the platform expects. The drop zone accepts files via the keyboard-accessible file picker as well as drag-and-drop, and result downloads use standard browser download flows. If you spot an accessibility gap, Favtoo treats it as a bug worth fixing.