Free Transparent Background API

A production REST API that removes the image background and returns a clean transparent PNG — no design software required. Start free with 500 credits, no credit card. After the free tier, it's just $0.0025 per image (0.5 credits), 8× cheaper than Photoroom and far cheaper than remove.bg. One HTTP call. Under 3 seconds.

Why developers choose this free transparent background API

Most background removal APIs charge you from request one. PixelAPI gives you 500 full-resolution image credits upfront — enough to validate your entire pipeline on real production data before you pay a cent. And when you do scale up, the per-image price is the lowest in the market at $0.0025.

Quick start — remove background in one API call

Sign up at pixelapi.dev/app, copy your key from the dashboard, and POST your image. The endpoint returns a generation_id; poll GET /v1/image/{id} until status=completed, then download the transparent PNG from output_url.

curl -X POST https://api.pixelapi.dev/v1/image/remove-background \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "[email protected]"
# Response: {"generation_id": "uuid", "status": "queued", ...}

# Poll until completed
curl https://api.pixelapi.dev/v1/image/UUID \
  -H "Authorization: Bearer YOUR_API_KEY"
# Response: {"status": "completed", "output_url": "https://..."}

pip install pixelapi
---
from pixelapi import PixelAPI

client = PixelAPI(api_key="YOUR_API_KEY")
result = client.remove_background(image="product.jpg")
result.save("product_transparent.png") # transparent PNG

npm install pixelapi
---
import { PixelAPI } from "pixelapi";

const client = new PixelAPI({ apiKey: process.env.PIXELAPI_KEY });
const result = await client.removeBackground({ image: "./product.jpg" });
await result.save("product_transparent.png"); // transparent PNG

composer require pixelapi/pixelapi
---
<?php
use PixelAPI\Client;

$client = new Client(getenv("PIXELAPI_KEY"));
$result = $client->removeBackground(["image" => "product.jpg"]);
file_put_contents("product_transparent.png", $result->getBody());

gem install pixelapi
---
require "pixelapi"

client = PixelAPI::Client.new(api_key: ENV["PIXELAPI_KEY"])
result = client.remove_background(image: "product.jpg")
File.binwrite("product_transparent.png", result.body)

go get github.com/pixelapi/pixelapi-go
---
import "github.com/pixelapi/pixelapi-go"

client := pixelapi.New("YOUR_API_KEY")
result, err := client.RemoveBackground("product.jpg")
if err != nil { panic(err) }
result.Save("product_transparent.png")

You can also pass a public image URL instead of uploading a file:

curl -X POST https://api.pixelapi.dev/v1/image/remove-background \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "image_url=https://example.com/product.jpg"

Pricing vs alternatives — who actually has a free transparent background API?

Most rivals offer a limited free tier that runs out quickly and switches to expensive per-image billing. Here's a side-by-side comparison:

Pricing verified from each rival's public pricing page May 2026. PixelAPI's per-image price is set at 8× cheaper than the cheapest commercial API rival (Photoroom $0.02/image) per our pricing principle.

What you get back

Common workflows using the transparent background API

Background transparency is the foundation for most product image pipelines. Each link below goes to a setup guide:

More use-case guides: all industries →

Integrations & SDKs

Connect the transparent background API to your existing stack without writing custom HTTP clients:

Comparison vs alternatives

Rate limits & error handling

Default rate limit is 60 requests per minute on the free tier and 600 requests per minute on paid tiers. When you exceed the limit, the API returns HTTP 429 with a Retry-After header indicating how many seconds to wait. The recommended pattern is exponential backoff starting at 2 seconds, doubling on each retry up to a 30-second ceiling.

# Python SDK handles 429 with automatic backoff
from pixelapi import PixelAPI
client = PixelAPI(api_key="...", max_retries=4)
result = client.remove_background(image="product.jpg") # auto-retries on 429

For batch workloads processing more than 600 images per minute, email [email protected] with your expected volume to discuss higher rate limit tiers.

Other common error codes:

Frequently asked questions