Exploring the Top Image Watermarking APIs (updated 2024)

When it comes to Image Watermarking APIs, there are different options out there: In this post, we will compare some of the top APIs that we tried.
Exploring the Top Image Watermarking APIs (updated 2024)
Sohail Pathan
Last updated on October 16, 2023


Ensuring the security and authenticity of documents has become increasingly important today when information is easily shared and accessed all over the place.

What are image Watermark APIs and why are they used?

Image watermarking APIs allow users to add watermarks to images. Watermarks can be used to:
  • Label sensitive & confidential documents
  • Protect intellectual property from unauthorised access.
  • Show the ownership of content.
Image watermarking result on ApyHub
Image watermarking result on ApyHub
In this article, we will explore and compare some of the most popular watermarking APIs.

Features & Functionality

Input Format

Only ApyHub let’s allows you to provide source input in both Text and Image. Whereas Imgix, Neutrinoapi and Quickchart only allow you to add a watermark as an image with PNG, JPG and File URL.
Result after adding Watermark - text watermark (left image) & image watermark (right image)
Result after adding Watermark - text watermark (left image) & image watermark (right image)


Whether it's an image watermark or a text watermark, proper alignment and positioning are important in order to ensure that the message of the image is not disrupted. ApyHub offers additional parameter options, such as the watermark's position, rotation angle, opacity, and size. Quikchart also allows for some customization including ratio and watermark position. Imgix provides customization options for **scaling and positioning** (using the X and Y axes). NeutrinoAPI offers more comparable options, including **opacity, position, scale, and the ability to add a **background colour**.
Quickchart Watermark API Documentation
Quickchart Watermark API Documentation

SDKs and Client Libraries

ApyHub provides the client code in 8 languages (C, C#, JavaScript, Go, NodeJS, Java, Python, and PHP) and SDKs in Node.js and Go. Imgix provides 8 client SDKs in Python PHP, Ruby, JavaScript, Swift, Java, C# and Go including plugins and integrations for external apps like Shopify. Neutrino and Quickchart don’t provide any SDK.
Client Code Generator : ApyHub
Client Code Generator : ApyHub

Documentation and Tutorials:

Apyhub APIs include thorough documentation, including the Authentication method, Error Codes, HTTP Response Codes, and Request Examples. Imgix has provided vast documentation for all the developers focused on Mobile and Web. Quickchart and Neurion have very simple and standard documentation for the API as they don’t provide any SDK.
API Documentation: Imgix
API Documentation: Imgix

API Testing

Most of the providers let you test the APIs right from a terminal in the platform. ApyHub also has an API Playground where you can test the APIs in the UI plus you can see the snippet of the provided input in cURL.
API Playground - ApyHub, Neutrinoapi and Imgix
API Playground - ApyHub, Neutrinoapi and Imgix


ApyHub has served *99.99% of uptime. Imgix, Neutrinoapi, and Quickchart also claim to have high uptime.


This is subject to change but at the time of writing, all providers offer a subscription-based tiered model including a free plan. The most generous free plan is from ApyHub, offering 2 Million API calls per month for free, whereas Imgix offers 1000 calls per day, Neutrinoapi offers 10 to 50 calls per day, so 300 - 500 calls per month and Quickchart doesn't offer any calls in the free plan for watermarking.
Pricing pages of Cloudinary and ApyHub
Pricing pages of Cloudinary and ApyHub

Community Support

Most of the providers offer dedicated channels such as Discord, Slack, or Chatbot Agent to their users to ask support questions. ApyHub has a dedicated Discord Server, which lets you interact directly with the support team in addition to email support. Imgix and Neutrinoapi provide email-based support. Quickchart has its own forum for users to discuss issues and raise the query.
Below is a summary of the comparison of the providers I looked at. We focused on:
  • #API calls
  • Inputs
  • File size
  • Pricing
  • Throttling
  • Storage
Provider# Calls (Free)Input MethodFile SizePricing ( PaidThrottlingStorage
ApyHub2M calls in the free planPNG, JPG, GIF, Text OR File URL50 MBStarting from 10 EUR/month. Custom pricing plan for Enterprises.1 call/s in the free planYes, 2 GB
Imgix1000 calls in free planPNG, JPG, TEXT OR File URL100 MBStarting from 75 EUR/month.1 call/s in the free planNO
Neutrinoapi300 - 1500 in free planPNG, JPG, BASE64 Or File URLNo LimitStarting from 9 EUR/month.6 call/s in the free planNO
QuickchartNo free API Calls for WatermarkFile URLN/AStarting from 40 EUR/month.N/ANO

Some additional providers:

You can also check CloudConvert, Cloudimage and Picnie as they also provide Watermarking API for specific formats.


When it comes to watermarking ApyHub, Quickchart, Neutrinoapi, and Imgix all provide unique features and benefits for developers. Depending on the specific project requirements, developers can choose the API that best suits their needs.
With factors such as supported file formats, conversion accuracy, integration simplicity, and additional functionalities, developers can make a decision and leverage the most useful API to streamline their document conversion workflows.

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