JavaScript Rendering API
AlterLab renders JavaScript-heavy websites using headless Chromium powered by Playwright. Scrape React, Angular, Vue, and any SPA at $0.004/request (250 pages per dollar). Custom wait conditions, screenshot capture, and anti-bot bypass included.
Simple API, Powerful Results
Get started in minutes with our intuitive API. One request gives you structured data, screenshots, PDFs, and more. No browser management, no infrastructure headaches.
Multi-Format Output
Markdown, JSON, HTML, text
Adaptive Rendering
JS, SPAs, shadow DOM
3 Lines to Integrate
Any language, any stack
Up to 5,000 free scrapes included. No credit card required.
Full Browser Rendering
Powered by Playwright. Perfect for SPAs, infinite scroll, and dynamic content.
Full Browser Rendering
Chromium-based rendering with Playwright for perfect compatibility.
Wait Conditions
Wait for selectors, network idle, or custom JavaScript conditions.
Screenshot Capture
Full-page or viewport screenshots in PNG or JPEG format.
Auto Tier Selection
AlterLab automatically uses the cheapest tier that works for your URL.
Perfect Use Cases
From SPAs to social media, we handle JavaScript-heavy sites.
Single Page Applications
Scrape React, Angular, and Vue apps that load content dynamically
Infinite Scroll Pages
Extract content from pages that load more items as you scroll
Interactive Dashboards
Capture data from charts, graphs, and interactive visualizations
Social Media Feeds
Extract posts, comments, and engagement metrics from social platforms
Unbeatable Pricing
$0.004 per request. Cheaper than competitors.
Why Teams Switch to AlterLab
Smart routing, no subscriptions, balance that never expires
| Feature | AlterLab You are here | ScraperAPI | Bright Data | Firecrawl |
|---|---|---|---|---|
Avg cost (real workload) Smart routing vs flat rate | ~$0.001 | $0.00049/credit | $0.0015 | $0.0063 |
Simple scrape Basic HTTP request | $0.0002 | $0.00049 | $0.0015 | $0.0063 |
JS rendering Full browser render | $0.004 | $0.0049 | $0.0015 | $0.0063 |
Free tier Free requests to start | Up to 5,000 scrapes | 5,000 credits | None | 500 scrapes |
Minimum Smallest purchase | $10 one-time | $49/month | $0 (PAYG) / $499/mo (subscription) | $19/month |
Balance expires? Does unused balance expire | Never | Monthly | Never (prepaid) / Monthly (subscription) | Monthly |
CAPTCHA solving Built-in CAPTCHA bypass | $0.02/solve | Extra cost | Extra cost | Not available |
Avg cost based on typical content/SEO workload (75% simple, 25% protected). Competitor prices from public pricing pages, March 2026.
Frequently Asked Questions
JavaScript Rendering Resources
Web Scraping with Node.js & Puppeteer
Complete guide to headless browser scraping with Node.js.
Node.js Scraping: Puppeteer vs Playwright
When to use Puppeteer, Playwright, or a scraping API.
Why Headless Browsers Get Detected
Common detection vectors and how to fix them.
Python Web Scraping API
5,000 free scrapes with Python SDK. No credit card required.
Your first scrape.
Sixty seconds.
$1 free balance. No credit card. No SDK.
Just a POST request.
No credit card required · Up to 5,000 free scrapes · Balance never expire