Best Remove Watermark API

A production REST API that erases watermarks, brand logos, copyright overlays, and any unwanted object from images — returning a clean, naturally inpainted result. One HTTP call. $0.0125 per image. No mask required: describe what to remove in plain text and the AI handles the rest. 5,000 free credits (7-day trial), no credit card.

Why choose the best remove watermark API?

Most watermark removal tools require you to manually draw a mask before they can erase anything. PixelAPI's remove-watermark endpoint accepts a plain-language description of the watermark — "the semi-transparent logo in the bottom-right corner" — and automatically locates, removes, and fills the region with realistic background content. The result looks natural, not patched.

The same endpoint also removes logos, date stamps, social-media handles, text overlays, people, objects, and anything else that shouldn't be in the final image. One endpoint, one price, zero manual editing required.

Quick start — remove a watermark in one API call

Sign up, copy your API key from the dashboard, and POST your image with a description of what to remove. The endpoint returns a generation id; poll until status=completed, then download the cleaned image.

curl -X POST https://api.pixelapi.dev/v1/image/remove-object \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "image=@photo.jpg" \
  -F "prompt=the watermark"
# 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_object(image="photo.jpg", prompt="the watermark")
result.save("photo_clean.jpg")

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

const client = new PixelAPI({ apiKey: process.env.PIXELAPI_KEY });
const result = await client.removeObject({
  image: "./photo.jpg",
  prompt: "the watermark",
});
await result.save("photo_clean.jpg");

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

$client = new Client(getenv("PIXELAPI_KEY"));
$result = $client->removeObject([
  "image"  => "photo.jpg",
  "prompt" => "the watermark",
]);
file_put_contents("photo_clean.jpg", $result->getBody());

gem install pixelapi
---
require "pixelapi"

client = PixelAPI::Client.new(api_key: ENV["PIXELAPI_KEY"])
result = client.remove_object(image: "photo.jpg", prompt: "the watermark")
File.binwrite("photo_clean.jpg", result.body)

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

client := pixelapi.New("YOUR_API_KEY")
result, err := client.RemoveObject("photo.jpg", "the watermark")
if err != nil { panic(err) }
result.Save("photo_clean.jpg")

Mask mode — pixel-precise watermark targeting

For watermarks in unusual positions or with complex shapes, supply a binary mask alongside the image. White pixels in the mask mark the area to erase; black pixels are preserved. Mask mode gives you exact control without relying on text detection.

curl -X POST https://api.pixelapi.dev/v1/image/remove-object \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "image=@product.jpg" \
  -F "mask=@watermark_mask.png"
# mask: white = remove, black = keep

Pricing — best remove watermark API pricing vs rivals

Pricing verified from each rival's public pricing page October 2026. Rivals that do not publish per-call API pricing are listed with a link to their pricing page. PixelAPI pricing sourced from pixelapi.dev/pricing.

What you get back

What kinds of watermarks can it remove?

The remove-object endpoint handles all of the following — just describe what to remove in the prompt field:

• Semi-transparent logo overlays — agency/stock watermarks placed diagonally across an image
• Corner brand logos — bottom-right or bottom-left placement, opaque or translucent
• Copyright text — small-print "© 2024 CompanyName" overlays on product photos
• Date and time stamps — camera-generated timestamps on photos
• Social media handles — "@username" text overlaid on social posts
• Shutterstock / Getty / Adobe Stock watermarks — preview watermarks on stock photos
• People, objects, and distractions — remove unwanted elements from any image

PixelAPI is intended for cleaning up images you own or have licensed. Do not use it to remove watermarks from content you do not have rights to.

Common workflows

The remove-watermark (remove-object) endpoint is used in these production workflows. Each links to a setup guide:

More use-case guides: all industries →

Integrations & SDKs

Comparison vs alternatives

Rate limits & error handling

20 requests/minute on the free trial, 60 on Starter, 120 on Pro and 300 on Scale, plus 3/10/20/50 parallel jobs respectively (see pixelapi.dev/docs/parallel-processing.html). Exceeding the limit returns HTTP 429 with a Retry-After header. Recommended: exponential backoff starting at 2 s, doubling on each retry up to 30 s. The Python and Node SDKs handle this automatically.

# Python SDK auto-retries 429 with backoff
from pixelapi import PixelAPI
client = PixelAPI(api_key="...", max_retries=4)
result = client.remove_object(image="bulk.jpg", prompt="the watermark")
# auto-retries on 429 with exponential backoff

Other error codes:

• 400 Bad Request — image too large, unsupported format, or all-black mask supplied
• 401 Unauthorized — missing or invalid API key
• 402 Payment Required — trial ended or credits exhausted; subscribe at /pricing
• 429 Too Many Requests — rate limit hit; retry after the Retry-After value
• 500 Internal Server Error — transient failure; retry with backoff

Frequently asked questions