Text Difference Comparison API

Text Difference Comparison API allows you to easily compare two strings or texts and view the differences between them. The API returns a JSON for easy processing and also provides pre-rendered results for HTML and CLI output

About the API:

Our Text Difference Comparison API is a powerful tool for comparing two strings or texts and identifying the differences between them. The API is designed to be easy to use and provides a variety of output options to suit your needs.

One of the key features of the API is its ability to return the results in an easy-to-process JSON format. This makes it simple to integrate the API into your existing applications and workflow. Additionally, the API also provides pre-rendered results for HTML and CLI output, giving you the flexibility to display the results in the format that works best for you.

The API compares two inputted texts and returns a JSON object that contains the differences between the two strings. The returned JSON contains the original strings with the differences highlighted.

The Text Difference Comparison API is designed to be highly accurate and efficient, making it ideal for a wide range of applications. Whether you're working on a software development project, a research project, or simply need to compare two documents, this API is an excellent choice. It can be used to compare different versions of a document, compare original and translated text, or even to compare two different sources of information.

Overall, our Text Difference Comparison API is a versatile and powerful tool that can help you quickly and easily compare two strings or texts and identify the differences between them. With its easy-to-use JSON output and pre-rendered results for HTML and CLI output, it's the perfect choice for any project that requires text comparison.


What this API receives and what your API provides (input/output)?

Pass two text strings and receive the difference recognized between them.


What are the most common uses cases of this API?

  1. Version control for software development: Developers can use the API to compare different versions of code and quickly identify any changes or updates.

  2. Quality assurance for translated text: The API can be used to compare the original text with its translation, and identify any errors or inconsistencies in the translation.

  3. Plagiarism detection: The API can be used to compare student papers or articles and identify any instances of plagiarism.

  4. Content comparison for SEO: The API can be used to compare the content of two websites and identify any similarities or duplicates, which can be useful for SEO and avoiding penalties.

  5. Document comparison for legal or financial industries: The API can be used to compare contracts, legal documents, or financial statements and identify any changes or discrepancies.

  6. News comparison: The API can be used to compare news articles from different sources to identify similarities, or to detect any bias or manipulation in the reporting.


Are there any limitations to your plans?

Besides API call limitations per month, there is a limitation of:

Free Plan: 10 requests per day. Up to 1000 characters. 

Basic Plan: Up to 50,000 characters.  

Pro Plan: Up to 100,000 characters. 

API Documentation


Compare 2 strings/texts and get the differences between them. The API provides both an easy-to-process JSON to work with and a pre-rendered result for HTML and CLI output.

**Diff-Types:** * `eq` = text passage is equal * `add` = text passage was added in text2 * `del` = text passage was removed in text2

POST https://zylalabs.com/api/1157/text+difference+comparison+api/1016/compare

Compare - Endpoint Features
Object Description
Request Body [Required] Json
Test Endpoint
                                                                                                                                                                                                                            {"diffs":[{"type":"eq","text":"Lorem ipsum "},{"type":"del","text":"d"},{"type":"add","text":"D"},{"type":"eq","text":"olor "},{"type":"del","text":"sit "},{"type":"eq","text":"amet"}],"html":"\u003cspan\u003eLorem ipsum \u003c/span\u003e\u003cdel style=\"background:#ffe6e6;\"\u003ed\u003c/del\u003e\u003cins style=\"background:#e6ffe6;\"\u003eD\u003c/ins\u003e\u003cspan\u003eolor \u003c/span\u003e\u003cdel style=\"background:#ffe6e6;\"\u003esit \u003c/del\u003e\u003cspan\u003eamet\u003c/span\u003e","cli":"TG9yZW0gaXBzdW0gG1szMW1kG1swbRtbMzJtRBtbMG1vbG9yIBtbMzFtc2l0IBtbMG1hbWV0"}


curl --location --request POST 'https://zylalabs.com/api/1157/text+difference+comparison+api/1016/compare' --header 'Authorization: Bearer YOUR_API_KEY' 
--data-raw '{
    "text1": "Lorem ipsum dolor sit amet",
    "text2": "Lorem ipsum Dolor amet"


API Access Key & Authentication
After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Text Difference Comparison API REST API, simply include your bearer token in the Authorization header.
Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

Simple Transparent Pricing No long term commitments. One click upgrade/downgrade or cancellation. No questions asked.
🚀 Enterprise Starts at
$ 10,000/Year

  • Custom Volume
  • Dedicated account manager
  • Service-level agreement (SLA)
Customer favorite features
  • ✔︎ Only Pay for Successful Requests
  • ✔︎ Free 7-Day Trial
  • ✔︎ Multi-Language Support
  • ✔︎ One API Key, All APIs.
  • ✔︎ Intuitive Dashboard
  • ✔︎ Comprehensive Error Handling
  • ✔︎ Developer-Friendly Docs
  • ✔︎ Postman Integration
  • ✔︎ Secure HTTPS Connections
  • ✔︎ Reliable Uptime

Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.

Prices are listed in USD (United States Dollar), EUR (Euro), CAD (Canadian Dollar), AUD (Australian Dollar), and GBP (British Pound). We accept all major debit and credit cards. Our payment system uses the latest security technology and is powered by Stripe, one of the world’s most reliable payment companies. If you have any trouble paying by card, just contact us at [email protected]

Additionally, if you already have an active subscription in any of these currencies (USD, EUR, CAD, AUD, GBP), that currency will remain for subsequent subscriptions. You can change the currency at any time as long as you don't have any active subscriptions.

The local currency shown on the pricing page is based on the country of your IP address and is provided for reference only. The actual prices are in USD (United States Dollar). When you make a payment, the charge will appear on your card statement in USD, even if you see the equivalent amount in your local currency on our website. This means you cannot pay directly with your local currency.

Occasionally, a bank may decline the charge due to its fraud protection settings. We suggest reaching out to your bank initially to check if they are blocking our charges. Also, you can access the Billing Portal and change the card associated to make the payment. If these does not work and you need further assistance, please contact our team at [email protected]

Prices are determined by a recurring monthly or yearly subscription, depending on the chosen plan.

API calls are deducted from your plan based on successful requests. Each plan comes with a specific number of calls that you can make per month. Only successful calls, indicated by a Status 200 response, will be counted against your total. This ensures that failed or incomplete requests do not impact your monthly quota.

Zyla API Hub works on a recurring monthly subscription system. Your billing cycle will start the day you purchase one of the paid plans, and it will renew the same day of the next month. So be aware to cancel your subscription beforehand if you want to avoid future charges.

To upgrade your current subscription plan, simply go to the pricing page of the API and select the plan you want to upgrade to. The upgrade will be instant, allowing you to immediately enjoy the features of the new plan. Please note that any remaining calls from your previous plan will not be carried over to the new plan, so be aware of this when upgrading. You will be charged the full amount of the new plan.

To check how many API calls you have left for the current month, look at the ‘X-Zyla-API-Calls-Monthly-Remaining’ header. For example, if your plan allows 1000 requests per month and you've used 100, this header will show 900.

To see the maximum number of API requests your plan allows, check the ‘X-Zyla-RateLimit-Limit’ header. For instance, if your plan includes 1000 requests per month, this header will display 1000.

The ‘X-Zyla-RateLimit-Reset’ header shows the number of seconds until your rate limit resets. This tells you when your request count will start fresh. For example, if it displays 3600, it means 3600 seconds are left until the limit resets.

Yes, you can cancel your plan anytime by going to your account and selecting the cancellation option on the Billing page. Please note that upgrades, downgrades, and cancellations take effect immediately. Additionally, upon cancellation, you will no longer have access to the service, even if you have remaining calls left in your quota.

You can contact us through our chat channel to receive immediate assistance. We are always online from 8 am to 5 pm (EST). If you reach us after that time, we will get back to you as soon as possible. Additionally, you can contact us via email at [email protected]

To let you experience our APIs without any commitment, we offer a 7-day free trial that allows you to make API calls at no cost during this period. Please note that you can only use this trial once, so make sure to use it with the API that interests you the most. Most of our APIs provide a free trial, but some may not support it.

After 7 days, you will be charged the full amount for the plan you were subscribed to during the trial. Therefore, it’s important to cancel before the trial period ends. Refund requests for forgetting to cancel on time are not accepted.

When you subscribe to an API trial, you can make only 25% of the calls allowed by that plan. For example, if the API plan offers 1000 calls, you can make only 250 during the trial. To access the full number of calls offered by the plan, you will need to subscribe to the full plan.

 Service Level
 Response Time



Related APIs