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cURL to Zig Converter

Convert curl commands to Zig code using std.http. Paste a command and the Zig snippet appears instantly — everything runs in your browser.

How to use this tool

Steps for using the cURL to Code.

  1. Copy a curl command — from API documentation, or from your browser's DevTools (Network tab → right-click a request → Copy as cURL (bash)).
  2. Paste it into Enter cURL command. The Zig std.http code appears instantly.
  3. Set up: Install Zig 0.14. The std.http API changes between Zig releases, so other versions may need small changes.
  4. Run it: Save the code as main.zig and run zig run main.zig. Replace placeholders such as YOUR_TOKEN first, and check any notes under the editors for curl options that have no std.http equivalent.

Example

GET with headers → Zig std.http

curl command
curl 'https://api.example.com/v1/users?page=2' \
  -H 'Accept: application/json' \
  -H 'Authorization: Bearer YOUR_TOKEN'
Zig std.http
const std = @import("std");

pub fn main() !void {
    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
    defer _ = gpa.deinit();
    const allocator = gpa.allocator();

    var client = std.http.Client{ .allocator = allocator };
    defer client.deinit();

    var body = std.ArrayList(u8).init(allocator);
    defer body.deinit();

    const result = try client.fetch(.{
        .location = .{ .url = "https://api.example.com/v1/users?page=2" },
        .headers = .{
            .authorization = .{ .override = "Bearer YOUR_TOKEN" },
        },
        .extra_headers = &.{
            .{ .name = "Accept", .value = "application/json" },
        },
        .redirect_behavior = .unhandled,
        .response_storage = .{ .dynamic = &body },
    });

    std.debug.print("{d}\n{s}\n", .{ @intFromEnum(result.status), body.items });
}

Common use cases

  • Zig command-line tools
  • Small static binaries that call an API

Converting curl to Zig std.http

std.http.Client is the HTTP client in Zig's standard library, with TLS built in. The code calls client.fetch with the URL, method, headers and payload, and collects the body in an ArrayList.

The converter reads the curl command the way curl does — the method (-X), headers (-H), request bodies (-d, --data-raw, --json, -F), query strings, basic auth (-u) and cookies — and writes the equivalent std.http code. Options that have no std.http equivalent are listed under the editors rather than silently dropped.

Limitations

  • std.http has no multipart helper, so file uploads are built by hand in the code.
  • There is no option to skip certificate checks (curl -k).
  • The code is a starting point: add timeouts, retries and error handling for production use.
  • Secrets in the curl command are copied into the code — move them to environment variables before committing.

Frequently asked questions

Why .extra_headers and .headers?

Headers the client sets itself (Authorization, Content-Type, User-Agent …) are overridden through .headers; everything else goes in .extra_headers.

Which Zig version is this for?

Zig 0.14. Zig is pre-1.0 and its standard library changes between releases, so check the std.http docs for your version.

Is my curl command sent to a server?

No. The conversion runs entirely in your browser, so tokens and passwords in the command never leave your device. Still, replace real secrets before sharing the generated code.