HTTP Request / cURL Builder

Lets you configure method, URL, query params, headers, auth, and body visually — then exports equivalent code for 8 languages/clients including cURL, JS fetch/axios, Python, PHP, Go, and HTTPie.

Yes — completely free, no signup, runs entirely in your browser. Nothing you type is sent to a server.

None, HTTP Basic (user/pass), Bearer Token, and API Key (sent as header or query parameter).

Yes, the HTTP Request / cURL Builder is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The HTTP Request / cURL Builder processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the HTTP Request / cURL Builder is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the HTTP Request / cURL Builder in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The HTTP Request / cURL Builder supports a wide range of popular formats and languages. Check the tool interface for the full list of supported options.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The HTTP Request / cURL Builder works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Both flags send data with a request, but they encode it differently. The -d flag sends an application/x-www-form-urlencoded body, where pairs are joined as key=value&key=value, which is what most simple forms and JSON APIs expect. The -F flag sends multipart/form-data, the format browsers use for file uploads; each field becomes its own part with boundaries, and you reference a file with file=@path. Using the wrong one is a common cause of a server rejecting a body or ignoring an uploaded file. In this builder you pick the body type instead of remembering flags: choose Form URL-encoded to get -d behaviour, or Multipart to get -F with file=@path support. The matching Content-Type header is set automatically, so the generated cURL, Python, or fetch code always encodes the body the way the API expects.

These are three common ways to prove who is making a request. HTTP Basic sends a username and password encoded together in an Authorization header, becoming -u user:pass in cURL. A Bearer Token sends a single secret string as Authorization: Bearer <token>, typical for OAuth and JWT-protected APIs. An API Key is a named secret the service issues you, sent either as a custom header like X-API-Key or appended to the URL as a query parameter, depending on what the API documents. Choosing the wrong scheme or wrong placement is a frequent cause of 401 responses. This builder offers all three plus None: pick the type, fill in the values, and for an API key choose header or query. The generated code translates each scheme correctly into every output format, from -u in cURL to SetBasicAuth in Go.

A cURL command is a single shell string, so every double quote inside a JSON body has to be escaped or the shell ends the argument early and reports a parse error. On macOS and Linux people often wrap the JSON in single quotes to avoid this, but that fails the moment the data itself contains an apostrophe, and Windows handles quoting differently again. Counting and escaping quotes by hand in a long payload is exactly where these commands tend to break silently. This builder sidesteps the problem: you paste raw, unescaped JSON into the Body field, and it generates a correctly quoted command with the right escaping for the shell. Because the same structured body is reused for every output, the fetch, Python requests, and Go versions stay valid too, so you never have to debug a stray quote across languages.

These are common advanced options. -L (--location) tells cURL to follow redirects, so a 301 or 302 response is chased to its final destination instead of returning the redirect itself. -k (--insecure) skips TLS certificate verification, useful against a local server with a self-signed certificate but unsafe for production traffic. -s (--silent) hides the progress meter and error messages for clean, scriptable output, while -v (--verbose) does the opposite, printing the full request and response headers so you can debug what was actually sent. There is also --max-time to cap how long a request may run. Rather than memorising these, toggle them as checkboxes in this builder's advanced options and set a timeout in seconds; the generated cURL command includes exactly the flags you enabled, with sensible equivalents reflected in the other output formats.

The reliable way is to rebuild the request from its parts rather than parsing the raw string, because curl syntax does not map one-to-one onto every language. Identify the method, full URL with query parameters, each header, the authentication scheme, and the body type, then express those in the target client: Python's requests, JavaScript fetch or axios, Node's https module, PHP's curl functions, Go's net/http, or HTTPie. Doing this by hand is error-prone, especially for auth and body encoding. This builder makes it mechanical: enter the request once in the form, then switch output tabs to read the same call in any of eight formats. Each version reflects your exact configuration rather than a generic stub, so Basic auth becomes auth=(user, pass) in Python and SetBasicAuth in Go. Copy any tab, or download it as a .py, .js, .php, or .go file.