Zero Overhead

Capture screenshots in Zig

Add screenshot and scrolling GIF capabilities to your Zig applications with std.http.Client. Zero hidden allocations, no headless browsers to manage.

Get API Key View Docs

Installation

1std.http.Client is included in Zig standard library
2Get your API key from the dashboard
3Set the X-KEY header in your requests

Authentication

Include your API key in the X-KEY header with every request:

const std = @import("std");

var client = std.http.Client{ .allocator = allocator };
var headers = std.http.Headers{ .allocator = allocator };
try headers.append("X-KEY", "your-api-key");

Zig Screenshot Example

Capture a screenshot or create a scrolling GIF animation with a simple GET request:

Screenshot

const std = @import("std");

pub fn main() !void {
    var client = std.http.Client{ .allocator = std.heap.page_allocator };
    defer client.deinit();

    var headers = std.http.Headers{ .allocator = std.heap.page_allocator };
    try headers.append("X-KEY", "your-api-key");

    const uri = try std.Uri.parse("https://api.scrnpix.com/screenshot?url=https%3A%2F%2Fexample.com&width=1280&height=720&format=png");
    var req = try client.request(.GET, uri, headers, .{});
    defer req.deinit();

    try req.wait();
    const body = try req.reader().readAllAlloc(std.heap.page_allocator, 10_000_000);

    const file = try std.fs.cwd().createFile("screenshot.png", .{});
    defer file.close();
    try file.writeAll(body);
}

Animation

const std = @import("std");

pub fn main() !void {
    var client = std.http.Client{ .allocator = std.heap.page_allocator };
    defer client.deinit();

    var headers = std.http.Headers{ .allocator = std.heap.page_allocator };
    try headers.append("X-KEY", "your-api-key");

    const uri = try std.Uri.parse("https://api.scrnpix.com/animate?url=https%3A%2F%2Fexample.com&scroll_duration=3000&scroll_easing=ease-in-out");
    var req = try client.request(.GET, uri, headers, .{});
    defer req.deinit();

    try req.wait();
    const body = try req.reader().readAllAlloc(std.heap.page_allocator, 10_000_000);

    const file = try std.fs.cwd().createFile("animation.gif", .{});
    defer file.close();
    try file.writeAll(body);
}

Response Format

On success, the API returns the image binary data directly in the response body.

Status Code	200 OK
Content-Type	image/png, image/jpeg, or image/gif
Body	Binary image data ([]u8)
Error Response	Error message with 4xx/5xx status

Key Features

Zero Setup

std.http.Client is built into Zig. No external dependencies or browser installations required.

Production Ready

Built on Cloudflare Workers with global edge network. Handles concurrency and browser lifecycle automatically.

Zig Integration

Manual memory control with comptime. Perfect for embedded systems, WASM, or performance-critical applications.

Rich Features

Custom viewport sizes, full page capture, PNG/JPEG formats, scrolling GIFs with 15 easing functions.

Frequently Asked Questions

Do I need to install any browser dependencies for Zig?

No. Scrnpix runs browsers on our infrastructure. You only need Zig's built-in std.http.Client to make HTTP calls.

Can I use this with Zig for WASM or embedded?

Yes. Scrnpix works with any Zig target — native applications, WASM modules, or embedded systems with network access.

How do I handle errors in Zig?

Use try/catch with error unions. A 200 status means success with image bytes in the response reader.

What Zig version is required?

Zig 0.11+ with std.http.Client support. The API is a simple HTTP GET request.

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