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I already have a JavaScript-based reader that parses and displays text in the browser. The next step is to make it speak the text smoothly while visually tracking each spoken word. Here’s what I need you to add or refine: 1. A Text-to-Speech layer that sounds natural—even a premium service is fine, as long as subscription fees stay reasonable. Feel free to recommend Google Cloud Text-to-Speech, Amazon Polly, Microsoft Azure, or another option if you can justify the quality-to-cost ratio. 2. Real-time word highlighting using a background-color change (my preferred style) so the reader clearly sees the current word as it is spoken. 3. Clean JavaScript integration: • a neatly commented section where I can paste my API key • callbacks or event hooks to keep speech and highlighting perfectly in sync, even when a user pauses, resumes, or seeks within the text I will provide the existing reader code and a sample passage so you can test timing accuracy. Once your updated readers reads the text fluidly, highlights every word on cue, and handles basic controls (play, pause, stop, seek), we can conclude the project
Project ID: 40610850
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Active 6 days ago
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Hello! Welcome to NexoraTec! We need a natural sounding TTS that highlights each word as it is spoken, keeping sync even when pausing or seeking. Fernando here and i am JavaScript developer in my team and happy to work with you. I will select a cost‑effective premium TTS (Google Cloud, Azure or Polly) and integrate it with your reader using precise time callbacks, updating the background‑color of the current word in real‑time. A clearly commented section for your API key will be added and all basic controls (play, pause, stop, seek) will stay in perfect sync. i have build a similar real‑time reader and i focus on audio‑visual synchronization. Questions 1. Which TTS service do you prefer for cost versus voice quality, so i can optimise the sync algorithm accordingly? 2. Do you need the highlighting style to match any existing CSS theme or should i apply a custom colour that stands out? Happy to plan the best way with you Thanks!
$10 USD in 1 day
3.7
3.7
101 freelancers are bidding on average $26 USD for this job

Hello, With our extensive experience in web development and mastery of the tools and technologies necessary for this project, we are the ideal team to seamlessly incorporate a live Text-to-Speech functionality into your existing Javascript-based reader. Our skills in frontend development and JavaScript in particular are perfectly aligned to making sure that the TTS not only sounds natural but is also synchronized flawlessly with the word highlighting - a service that can be achieved within your budget constraints. Additionally, our expertise extends to leveraging APIs for smooth application integration, such as neatly commenting a section for easy API key insertion, creating callbacks or event hooks for real-time control synchronization. We know just how crucial it is for users to have a worry-free experience when navigating through text, even when it comes to pausing, resuming or seeking within passages. As we look forward to partnering with you, rest assured that we are committed to delivering nothing short of excellence. We understand your desire to incorporate a "WOW" factor into your project and we assure you this penchant for delivering quality work has made us one of Pakistan's leading web service provider companies. Let us combine your vision with our skills and create something exceptional together - transforming your reader into an engaging, seamless user experience. Thanks!
$30 USD in 1 day
8.6
8.6

Hi, I’m a senior developer with 20+ years of experience delivering production-grade web applications and audio integrations, including similar text-to-speech systems, so this is straightforward. I’ll integrate a cloud TTS service—likely Azure Speech or Google Cloud TTS based on your quality and cost needs—into your existing JavaScript reader. The implementation will add a small, well-commented module for your API key, a real-time word-highlighting layer that tracks audio timing, and event hooks for play/pause/seek to keep speech and highlighting in sync. I’ll test with your sample passage to ensure smooth timing and reliable playback. After validation, I’ll bundle the changes in a clean patch you can drop into your codebase. I can start immediately.
$30 USD in 1 day
8.0
8.0

Hello, I can see the real pain point here: you don’t just need speech , you need the reader and the audio to behave like one instrument. I’ve built browser-based JS features with TTS APIs before, and I can wire in a clean, reliable setup for natural-sounding playback plus word-level highlighting that stays aligned through play, pause, stop, and seek. I’d recommend the TTS provider based on your cost/quality target, then I’ll integrate the API hook cleanly into your existing reader code, add the background-color word tracking, and make sure the timing logic stays stable during user controls. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. If you send the current reader code and sample passage, I can map the sync flow quickly and start from there. Do you want the highlighting to follow exact spoken word boundaries, or is a visually smooth approximation acceptable when the TTS engine groups words differently? Thanks, Asad
$30 USD in 3 days
8.2
8.2

Hi, I will integrate a Text-to-Speech layer using a premium service like Google Cloud Text-to-Speech, Amazon Polly, or Microsoft Azure to ensure natural-sounding speech. I will implement real-time word highlighting with background-color change for clear visibility. The JavaScript integration will include a section for API key insertion and callbacks for seamless synchronization between speech and highlighting. Let's discuss further details in chat. Regards, Sai Bhaskar
$30 USD in 1 day
7.8
7.8

Hello, I checked your "Live TTS With Word Highlight" project and it looks like understanding the existing workflow will be important before making any changes. I've worked on similar PHP projects involving php, javascript, software architecture, jquery / prototype, web development, frontend development, audio processing, microsoft azure, api integration, speech synthesis and prefer delivering work in small milestones so everything stays easy to review and adjust if needed. If you can share a few more details about the current setup and expected outcome, I'll suggest the best approach and provide an accurate timeline. ⭐ 5.0/5 from a recent client: "Project was delivered before Time with Best professional Knowledge One could ever held. Thanks for the support" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$18 USD in 1 day
7.7
7.7

Hello, I've read through your project, and it seems you’re looking to enhance your JavaScript-based reader with a natural-sounding Text-to-Speech feature that highlights words in real-time. With 7+ years of experience in web development, I can help you integrate a smooth TTS layer, ensuring it stays in sync with the highlighted words as they are spoken. I would recommend exploring Google Cloud Text-to-Speech for its quality and reasonable pricing. I can create a clean integration that includes a commented section for your API key and event hooks to manage play, pause, and seek functionalities seamlessly. Just to clarify, do you have a preferred color scheme for the word highlighting, or should I suggest one that complements the current design of your reader? Best regards, Ivan Mandinski
$15 USD in 1 day
7.5
7.5

I'll integrate Azure or Google Cloud TTS with precise word-level timing, synchronized background highlighting, and clean JavaScript hooks supporting play, pause, stop, and seeking application. I've implemented browser-based speech playback with synchronized text highlighting and responsive controls. Estimated timeline: 2–5 days Budget: $100 USD Let's discuss and get started. Ajharul
$100 USD in 7 days
7.5
7.5

Hello, I can integrate a natural-sounding TTS engine with precise word-level synchronization for your existing reader. I built a similar audio playback system with React and the Web Audio API where we had to handle dynamic text highlighting and playback control, which required careful timing adjustments for smooth user experience. I'd approach this using Google Cloud TTS for high-quality output because it keeps latency low while keeping costs predictable, and the Speech Synthesis API for real-time word tracking. The biggest improvement will come from pre-calculating word timings and using event callbacks to ensure the highlighting stays perfectly aligned with the audio. I'll keep the integration modular so changes are easy to review and test before deployment. This setup will give your readers a smooth, professional playback experience that feels more like a podcast than a basic TTS tool. Happy to test with your sample passage and adjust the timing as needed. I can start right now. Thanks, Denis.
$30 USD in 1 day
6.5
6.5

Hi, I can enhance your existing JavaScript reader with natural-sounding Text-to-Speech and precise, real-time word highlighting. I'll recommend the best balance of quality and cost (such as Google Cloud TTS, Azure Speech, or Amazon Polly), integrate it cleanly into your current code, and ensure speech and highlighting stay perfectly synchronized during play, pause, resume, and seek. The code will be well-commented, with a dedicated section for your API key, making it easy to maintain and extend in the future. I'm ready to test it using your existing reader and sample text to ensure smooth, accurate playback. Thank you, Axon Digital
$20 USD in 1 day
6.8
6.8

As a highly skilled and experienced Full-Stack Developer, my devotion to building clean, maintainable code that supports real-world needs makes me the perfect candidate for your project. JavaScript is my forte, and I'm well-versed in leveraging its potential in creating seamless integration and clean architecture. Also, my prowess extends to PHP, which will come in handy while implementing the TTS APIs and ensuring smooth callbacks for all the interactive features required. Our proficiency in cloud services like AWS and Azure equips us to analyze the quality-to-cost ratio of several Text-to-Speech options accurately. With that said, I can assure you of my capacity to recommend not just any but an efficient TTS service fitting perfectly with your subscription budget while delivering high quality natural sounds. Lastly, my rich experiences with various APIs and intricate app integrations provide me an edge foundational to handling every aspect of your project - from providing you with a neat commented section for API key pasting to guaranteeing the callbacks or event hooks syncing speech and highlighting even under contingencies like pauses, resumes or text seeking within the browser.
$20 USD in 3 days
7.1
7.1

Hello There! I’m Md Toriqul Islam, an experienced JavaScript & Full-Stack Developer with 10+ years of experience. I’m excited to partner with you and can dive into your project immediately. I have rich experience in JavaScript, Web Speech APIs, Text-to-Speech integrations, API development, interactive UI features, and real-time browser applications. I understand you need to enhance your existing JavaScript reader with a natural TTS layer and accurate word-by-word highlighting. I can integrate a suitable TTS solution such as Google Cloud TTS, Amazon Polly, Azure Speech, or another cost-effective option, while implementing smooth play/pause/stop/seek controls and synchronised background highlighting through clean, maintainable JavaScript. I am skilled in JavaScript, HTML, CSS, APIs, Text-to-Speech, Web Audio, and Frontend Optimisation. I’m ready to start immediately and would be happy to review your existing reader code and sample text to ensure accurate speech synchronisation. Looking forward to hearing from you. Best regards, Md Toriqul Islam
$10 USD in 1 day
6.3
6.3

Hi, There, I can integrate natural-sounding TTS into your existing JavaScript reader and synchronize background highlighting with each spoken word using provider timing metadata rather than unreliable estimated delays. I’ll implement play, pause, resume, stop, and seek controls while keeping the audio and highlighted text aligned after every interaction. The integration will be cleanly commented, including secure API configuration guidance, and I can recommend Azure Speech or Amazon Polly based on the best voice-quality-to-cost ratio after reviewing your current files. I can start immediately and complete the tested solution within 2 days for $30. Waqas Ahmad
$30 USD in 7 days
6.3
6.3

Hi. To make your reader speak fluidly and highlight each spoken word in real time, I’d wire a TTS engine into your existing JavaScript parser with sync events driving the background-color updates. I’d use a reliable voice stack like Google Cloud TTS or Azure Speech, then keep playback control state aligned with a word-timing map so pause, resume, stop, and seek stay accurate. The integration will stay clean, with a commented API key section and a small event layer that you can plug into your current code without refactoring the reader. I’ll also test timing against your sample passage and tune the word boundary logic so the highlight follows the audio naturally, not lagging behind. As a Senior JavaScript Developer, I have mastered JavaScript, Web Audio, TTS APIs, and browser event synchronization and have strong experience in reader apps, voice playback tools, and interactive text systems. I am sure I can deliver high-quality results within a few days depending on the current codebase size. Let’s get in touch and discuss more. Thanks.
$24 USD in 4 days
6.0
6.0

Hi, I can enhance your existing JavaScript reader with natural sounding Text to Speech and precise word by word highlighting that stays perfectly synchronized during playback. I’ll recommend the best TTS service based on quality, cost, and responsiveness, then integrate it with clean, well commented JavaScript so you can easily manage the API key. My approach focuses on accurate timing, smooth background color highlighting, and reliable play, pause, stop, and seek controls without breaking your existing reader. I’ll also ensure the speech and highlighting remain synchronized through callbacks and event handling for a seamless reading experience. I’d be happy to review your current code and sample text to deliver a polished, easy to maintain solution. Best Regards, Fizza Nadeem K
$15 USD in 1 day
5.9
5.9

Hi , I have gone through your project, Live TTS With Word Highlight, and I am ready to start working as soon as you confirm. I offer best quality and highest performance at a reasonable price, with on-time delivery. I’m well-versed in PHP, Python, CSS, HTML, JavaScript, jQuery, Bootstrap, Angular, AJAX, Laravel, WordPress, Speech Synthesis, Frontend Development, jQuery / Prototype, API Integration, JavaScript, Software Architecture, Web Development, Microsoft Azure, Audio Processing and PHP. I’d love to discuss the project further to ensure we’re aligned on the scope, timeline, and deliverables. Please let me know a convenient time for us to connect, and I’ll be happy to accommodate. Thank you
$10 USD in 1 day
6.2
6.2

In the thriving world of digital technologies, a great user experience relies on the flawless implementation of technical features. My name is Aliza, and in my decade-plus tenure as a Web & App Developer, I’ve built a reputation for delivering clean solutions that perform proficiently and scale effectively. I possess the strong technical skill set and deep-seated understanding of frontend development (JavaScript, HTML, CSS) that this project requires. When it comes to API integration, precision is key—especially since we aim to implement real-time word highlighting synchronized with text-to-speech. Having successfully integrated Google Cloud Text-to-Speech, Amazon Polly, and Microsoft Azure in previous projects, I am well-equipped to recommend and implement the best option for you based on quality-to-cost ratio. My experience here will ensure smooth speech flow while dynamically tracking each spoken word with clean JavaScript integration. Furthermore, our work doesn't stop when the job is delivered. I pride myself on my post-delivery support, ensuring that once this project is completed—that everything from speech fluency to word-highlighting—runs seamlessly in your future endeavors as well. With me as part of your team, you can expect commitment to quality service and client satisfaction. Let’s work together to turn your idea into a powerful digital experience!
$10 USD in 1 day
5.8
5.8

I’ve integrated TTS with real-time word highlighting before using Web Speech API, Google Cloud TTS, and Amazon Polly—this is right in my wheelhouse. I’ll swap the existing reader’s output event stream into a speech controller that feeds text chunks to Google Cloud TTS (SSML timing tags for precise word alignment) via REST, parse the returned audio stream into the browser, and synchronize playback with DOM word highlights using requestAnimationFrame; controls (play/pause/stop/seek) will bind to the same timing source to avoid drift. I’ll expose a single // API_KEY comment block for your key and expose onWord, onBoundary, onEnd callbacks so your existing UI can attach to the timing layer. Latency and sync tests will run against the sample passage you provide before final integration. I can start immediately. Thanks, Andrii
$20 USD in 1 day
5.1
5.1

Hello, I can enhance your JavaScript-based reader by integrating a natural Text-to-Speech system with accurate real-time word highlighting. I have experience working with browser speech APIs, cloud TTS services, event callbacks, and interactive UI features. I can implement smooth play/pause/stop/seek controls, API integration, and precise speech synchronization for a polished reading experience.
$20 USD in 3 days
4.9
4.9

I have experience working with JavaScript-based web applications, API integrations, speech technologies, and interactive UI features. I can integrate a suitable TTS provider such as Google Cloud Text-to-Speech, Amazon Polly, or Azure Speech depending on the best balance between voice quality, synchronization support, and ongoing cost. For this project, I can deliver: - A natural-sounding text-to-speech layer integrated into your existing reader. - Real-time word highlighting with background-color transitions synced to spoken audio. - Play, pause, stop, and seek controls with proper state handling. - Clean JavaScript integration with clearly documented API configuration sections. - Event callbacks/hooks to keep speech playback and visual tracking synchronized. - Testing and adjustment using your sample passages to improve timing accuracy. Quick question : Does your current reader already wrap words in separate HTML elements, or will the highlighting functionality require restructuring the rendered text? Regards, Shawana.
$20 USD in 7 days
5.0
5.0

Drawing on my extensive experience in API integration, frontend development and JavaScript, I guarantee not only a seamlessly integrated and smooth Text-to-Speech(TTS) function with real-time word highlighting, but also a clean JavaScript code. For TTS functionality, I will recommend and integrate the best option that delivers high-quality speech like Google Cloud Text-to-Speech, Amazon Polly or Microsoft Azure while adhering to your budget limitations - ensuring subscription fees stay reasonable. Having worked with these services, I'm well aware of their quality-to-cost ratio. To achieve the required word highlighting features as you described it— changes in background colour—I assure you 100% synchronization of the speech and highlighting using callbacks or event hooks regardless of user actions such as pausing, resuming or seeking within the text. Equipped with excellent problem-solving skills and a deep understanding of software architecture, I will leverage my technical skills effectively for this project's success. My portfolio speaks volumes about my commitment to client satisfaction and long-term client relationships. Let's uphold your value for efficiency, reliability as I transform your existing reader code into an efficient masterpiece that powers your business growth.
$30 USD in 2 days
5.2
5.2

Orlando, France
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