cURL vs Wget: Differences, Commands & When to Use Each

cURL and Wget can both retrieve a URL, but they are optimized for different jobs. cURL is a general data-transfer client with precise control over requests, headers, bodies, authentication, uploads, and proxies. GNU Wget is a retrieval tool designed around downloading files reliably and following links recursively.

The practical choice is usually simple: use cURL for APIs and custom requests; use Wget for unattended downloads and controlled site mirrors.

Quick Answer

Choose cURL when you need to call an API, inspect or customize an HTTP request, upload data, use several transfer protocols, or configure a proxy per command. Choose Wget when you need reliable file retrieval, URL-list downloads, automatic continuation, or recursive mirroring. Both can download files, resume transfers, retry failures, authenticate, and use HTTP proxies, but their defaults and strongest workflows differ.

Key Takeaways

• cURL is the stronger request tool. It is better suited to APIs, custom headers, JSON, multipart forms, uploads, debugging, and per-request proxy settings.
• Wget is the stronger retrieval tool. It saves downloads to disk by default and supports recursive retrieval, page requisites, link conversion, and mirroring.
• Both tools can do more than their stereotype suggests. GNU Wget can send POST, PUT, headers, and request bodies; cURL can download and resume files.
• Neither retries every failure safely by default. Define retryable status codes, attempt limits, time budgets, and whether the operation is safe to repeat.
• Only Wget has built-in recursive downloading. The cURL command-line tool deliberately does not crawl links.
• A proxy changes the connection route, not the command's purpose. Use one when the workflow needs its location, IP type, or network path—not as a substitute for permission or correct request logic.

cURL vs Wget Comparison

This guide covers the curl command-line client and classic GNU Wget 1.x. Wget2 is a separate project with a different feature set.

Neither tool is universally better. A one-line file download may be equally reasonable with either. The differences become important when the workflow needs API ergonomics or recursive link traversal.

Tested Commands and Results

We tested the main behaviors against a controlled local HTTP origin and a separate authenticated local HTTP proxy. This made retries, byte ranges, authentication failures, uploads, and recursive links deterministic without sending test traffic to an unrelated site.

Tested versions were cURL 7.88.1, GNU Wget 1.21.3, and Python 3.11.2 on Linux x86_64. These are functional checks, not a speed comparison. Results can differ with another build, server, operating system, authentication scheme, or proxy.

What Is cURL?

cURL is a command-line data-transfer tool built on libcurl. The executable is written as curl, and its supported protocols depend on how that particular build was compiled. Run this to see the installed version, TLS backend, features, and protocols:

cURL is especially useful when the request itself matters. It can set headers, choose methods, send JSON or forms, upload files, display response headers, authenticate, select a proxy, limit time, and expose detailed connection diagnostics.

For a broader introduction, see What Is cURL?.

What Is GNU Wget?

GNU Wget is a non-interactive network downloader. It is designed to retrieve resources without a user interface, continue through unstable connections, read batches of URLs, and traverse HTML or CSS links recursively.

Check the installed version and compiled capabilities with:

Wget is not limited to simple GET requests. Current GNU Wget supports custom HTTP methods, headers, POST data, and raw body files. Its main advantage is still retrieval: local filenames, continuation, timestamping, recursive traversal, page requisites, and mirror-friendly behavior are central features rather than add-ons.

How to Install cURL and Wget

Check first; package availability and bundled versions vary by operating system.

Debian and Ubuntu

Fedora

macOS

macOS includes a system build of cURL. Check it with curl --version. GNU Wget is not included by default; one common installation route is Homebrew:

Avoid replacing the operating system's cURL binary casually. If a newer feature is required, install a separate package and confirm which executable your shell resolves.

Windows

Current Windows installations normally provide curl.exe. Use the executable name explicitly in Windows PowerShell environments where curl could resolve to another command:

GNU Wget is not a standard Windows component. Use a trusted package source or run it inside Windows Subsystem for Linux. Verify the publisher, package version, and checksums before installing a third-party Windows binary.

Download One File With cURL or Wget

For a single file, both tools are appropriate.

cURL download

• --fail makes HTTP 400-and-higher responses return an error instead of silently becoming the output file.
• --location follows redirects.
• --output selects the local filename.

Without --output or --remote-name, cURL writes the response body to the terminal. Use --remote-name when the URL's final path segment is the desired filename:

Wget download

Wget saves to a file by default, so the shorter form is often enough:

Use an explicit destination in automation so reruns and downstream paths are predictable. Check the exit status and validate the resulting size, content type, or checksum rather than assuming that the presence of a file proves success.

cURL vs Wget for API Requests

cURL is usually the better API client because it makes headers, methods, bodies, output, and diagnostics easy to compose.

GET JSON with cURL

This combination is useful in scripts:

• --silent removes the progress meter.
• --show-error keeps error messages.
• --fail-with-body returns a failure status for HTTP errors while retaining the response body for diagnostics.

POST JSON with cURL

--json was added in cURL 7.82.0. It sends the supplied data and sets JSON-oriented request headers. On an older version, use explicit headers and --data:

POST JSON with Wget

GNU Wget can send the same request:

--output-document=- writes the response to standard output. This is workable for occasional requests, but cURL generally provides a clearer interface for API-heavy scripts, multipart data, request tracing, and fine-grained transfer controls.

cURL vs Wget for Uploads

cURL is the straightforward choice when an API expects a file upload.

Multipart form upload with cURL

cURL constructs the multipart/form-data request, including boundaries and file metadata.

Raw PUT upload with cURL

The server must support that method and authorize the operation.

Raw request body with Wget

GNU Wget can send a file as a raw body:

However, the GNU Wget manual states that these body options do not provide multipart form upload. If the endpoint requires multipart/form-data, use cURL or an application library that implements the expected request format.

Resume an Interrupted Download

Both tools can request the remaining bytes of a partially downloaded file.

Resume with cURL

--continue-at - tells cURL to inspect the local output file and resume from its current size.

Resume with Wget

Continuation depends on the server supporting byte-range requests and the remote file remaining compatible with the partial local copy. If the remote object changed, appending new bytes to old content can corrupt the result. For important downloads, validate a published checksum or another trusted integrity value after completion.

In our controlled test, both commands reconstructed the same 212,992-byte file from an initial 32,768-byte partial download.

Configure Retries Carefully

Retries should be bounded and limited to failures that are safe to repeat. A repeated GET download is usually different from repeating an order-creation POST.

cURL retries

The cURL manual documents the transient failures handled by --retry and its treatment of Retry-After. Do not add --retry-all-errors by habit: the official cURL manual calls it a broad option and warns about duplicate data and redirected input/output.

Wget retries

--tries controls attempts per URL. --retry-on-http-error makes the selected HTTP statuses retryable; verify that the installed Wget version supports it.

For either tool:

1. Set an attempt limit.
2. Set connection and total-time limits appropriate to the job.
3. Respect Retry-After and service-specific rate limits.
4. Retry only operations that are idempotent or protected by an idempotency key.
5. Log the final failure instead of silently treating a partial download as complete.

The controlled test returned HTTP 503 twice. Both tools succeeded on attempt 3 with the explicit retry settings shown by the test fixture.

Download a List of URLs

Wget has a direct input-file workflow. Put one authorized URL per line in urls.txt, then run:

cURL can accept multiple URLs and supports parallel transfers in current versions, but output naming needs deliberate configuration:

Confirm that your installed cURL supports --parallel. Bound concurrency so the client does not overwhelm the destination or saturate the local connection.

Recursively Download or Mirror a Website With Wget

The cURL command-line tool does not parse documents and follow their links. The official cURL FAQ explicitly says recursive fetching is not built in.

GNU Wget can parse HTML and CSS, follow permitted references, fetch page requisites, and convert links for local viewing. A controlled mirror command might look like this:

The important controls are:

• --mirror enables recursion and timestamping behavior suitable for a mirror.
• --level=2 overrides the otherwise broad mirror depth with a deliberate limit.
• --no-parent prevents traversal above the starting directory.
• --domains restricts followed hosts.
• --page-requisites fetches resources needed to render pages locally.
• --convert-links rewrites downloaded links for offline use.
• --wait, --random-wait, and --limit-rate reduce load.

Recursive retrieval can expand far beyond the initial page. Use it only for a site you own or are authorized to archive, respect applicable terms and rights, retain Wget's default robots behavior, and test with a low depth first. A local copy is not permission to republish copyrighted material.

Our controlled mirror collected three linked HTML pages, a stylesheet, a referenced asset, and robots.txt. It did not establish that the same command is suitable for every real site.

Authentication With cURL and Wget

Both tools support HTTP Basic authentication.

Basic authentication with cURL

Basic authentication with Wget

Bearer tokens can be sent as a header:

The literal username/password forms above are placeholders. Production secrets should not be committed to source code or left in shared shell history, process listings, screenshots, or debug logs. Prefer a protected .netrc or tool configuration file, a secret manager, or your operating environment's approved credential mechanism, and restrict file permissions.

Use cURL or Wget With a Proxy

cURL proxy command

cURL can also use SOCKS proxies. Use socks5h:// when the proxy should resolve the destination hostname:

Wget proxy command

GNU Wget normally reads HTTP, HTTPS, and FTP proxy settings from lowercase environment variables:

Use no_proxy for destinations that should connect directly. Be careful with inherited proxy environment variables in CI systems: a command may use a proxy even when it is not visible in the command itself.

The proxy test for this article used a controlled authenticated HTTP proxy. Both tools reached the origin through it, and both rejected an intentionally wrong proxy password. No successful direct fallback was observed during those failed-authentication checks. That validates the tested syntax and failure path, not every proxy protocol or provider.

With Proxidize, use the hostname, port, protocol, username, and password generated for the relevant access point. Residential proxies are the usual fit for global location-specific requests, while mobile proxies are designed around real US mobile-network exits. The proxy manages the route; cURL or Wget still manages the request or download. For deeper cURL coverage, read How to Use cURL With a Proxy.

cURL or Wget: Which Should You Choose?

For a long-running application, neither command-line tool may be the final architecture. An HTTP library gives the program structured responses, cancellation, metrics, connection pooling, tests, and explicit secret handling. Use the CLI tools for shell automation, diagnostics, controlled transfers, and jobs where their process model is appropriate.

Common cURL and Wget Mistakes

Saving an HTTP error page as the requested file

cURL does not treat HTTP 404 or 500 as a command failure unless a fail option is enabled. Use --fail for downloads or --fail-with-body when an API error body is useful. Wget reports server errors through its exit status, but scripts must still check that status.

Forgetting cURL redirect handling

Add --location when the expected download URL redirects. Review authentication behavior across hosts before forwarding sensitive credentials.

Retrying state-changing requests blindly

Repeating a POST or PUT can create duplicate effects. Use idempotency support or application-specific recovery instead of assuming that a network error means nothing happened.

Resuming into the wrong local file

Continuation appends based on local size. Confirm that the local partial file belongs to the same remote object and validate integrity after completion.

Running an unbounded recursive download

--mirror is intentionally broad. Restrict depth, domain, and directory; add delays; estimate storage; and monitor the first run.

Exposing credentials

Command-line arguments, environment variables, config files, verbose logs, and process inspection each have different exposure risks. Use the secret-storage mechanism approved for the operating environment and redact diagnostics before sharing them.

Disabling TLS verification as a permanent fix

Do not make curl --insecure or Wget's certificate-bypass option a routine workaround. Fix trust configuration, hostname mismatches, missing certificate chains, or proxy CA trust instead.

Assuming a proxy fixes the application workflow

A proxy cannot repair a malformed request, failed authentication, wrong URL, absent file, or unauthorized recursive crawl. Verify the direct workflow first when practical, then add and test the network route.

Final Verdict

cURL is the better default for APIs, custom HTTP requests, uploads, debugging, protocol flexibility, and explicit per-command proxy control. GNU Wget is the better default for file-oriented automation, URL lists, continuation, recursive retrieval, and controlled website mirrors.

There is substantial overlap. The useful distinction is not that cURL transfers data while Wget downloads data—both do both. It is that cURL exposes the request as the main object, while Wget treats retrieval and traversal as the main job.