RedLinz

RedLinz is a browser-based visual markup tool built specifically for human-to-AI handoffs. It solves a fundamental problem developers, designers, and product teams face daily: how to tell an AI exactly what to change in a visual interface without playing a frustrating game of guesswork. Instead of writing three paragraphs describing which button is the wrong shade of blue, or handing an AI a raw screenshot and hoping it interprets your intent correctly, RedLinz lets you mark up the image directly with standardized symbols that carry machine-readable meaning. Circle an element, draw an arrow, stamp an X, or add a numbered sequence of changes. Each annotation carries semantic data the AI can parse. When you export, RedLinz generates a structured prompt with exact coordinates, annotation types, and labels. The AI receives both the annotated screenshot and a precise text prompt that leaves zero ambiguity about what needs to change. RedLinz works with Cursor, Claude Code, ChatGPT, Perplexity, Grok, and any AI tool that reads text and images. All annotation processing happens client-side, so your images never leave your browser. It is free forever for five markups per month with no credit card required. For power users, Pro unlocks unlimited, watermark-free exports at eight dollars monthly or eighty-two dollars yearly. RedLinz is built for developers shipping code through Cursor, designers handing off Figma specs, marketers refining landing page copy, and founders who need to communicate visual changes fast without endless follow-up messages.

Twelve Semantic Markup Symbols

RedLinz provides twelve standardized annotation symbols, each carrying specific machine-readable meaning that AI assistants can interpret and act on. The symbol set includes circle for changing an element, arrow for moving or pointing, rectangle for applying changes to a region, callout bubble for typed notes with a tail, checkmark to confirm something is correct, X stamp to delete or remove, number stamp for ordered changes, strike line to remove text, color drop to change an element to a specified color, eyedropper to sample any color on screen, eraser to remove annotations, and image or logo drop to add an asset. This professional symbol set mirrors what designers have used for decades but now works directly with AI tools.

Structured Prompt Export

When you finish annotating, RedLinz does not just export a flat screenshot. It captures the annotated image and simultaneously generates a structured AI prompt that includes coordinate data, annotation types, and precise instructions for every mark you made. Instead of sending an AI a picture and hoping it guesses which element you meant, you paste both the screenshot and the structured prompt into your AI tool. The agent immediately understands exactly what to change, where to change it, and in what order. This eliminates the back-and-forth of clarifying what you meant.

Client-Side Privacy and Security

All annotation processing happens entirely within your browser. Your images, screenshots, and markups never leave your device or get uploaded to external servers. This client-side architecture means sensitive design files, unreleased product screenshots, and confidential client work remain completely private. You can mark up staging environments, competitor landing pages, or internal Figma exports without worrying about data leaks. Privacy is built into the product from day one.

Cross-Platform AI Compatibility

RedLinz works with every major AI tool that accepts text and image inputs. You can export your annotated screenshot and structured prompt and paste them directly into Cursor, Claude Code, ChatGPT, Perplexity, Grok, or any other AI assistant. There is no vendor lock-in and no specialized integration required. The export format is universal, so you can use the same markup workflow regardless of which AI tool your team prefers for different tasks like coding, copywriting, or design revisions.

Bug Reports Cursor Does Not Misread

Stop writing three paragraphs describing which button is broken or which layout element is misaligned. Take a screenshot of the bug, circle the problematic element, add a quick note with the callout tool, and export the structured prompt. Paste it into Cursor or Claude Code, and the AI immediately understands exactly which element to fix and what the expected behavior should be. No more guessing games, no more wasted iterations on the wrong button.

Ship the Ten Percent Claude Got Wrong

When Cursor or Claude Code builds you something ninety percent correct, the last ten percent is often the hardest to communicate. Instead of writing a long explanation of what needs to change, mark up the screenshot of what was generated. Circle the elements that need adjustment, number them in order, and add notes. Export the prompt and paste it back into the AI. The fix gets applied correctly the first time, saving you multiple rounds of revision.

Mark Up Any Page for Better Copy

Screenshot your landing page or a competitors page, box the weak sections using the rectangle tool, and add callout notes describing what the copy should communicate. Hand ChatGPT or Claude a structured brief instead of a vague make it better request. The AI receives precise instructions about which headline to rewrite, which call-to-action button to revise, and what tone the replacement copy should use. Your marketing iterations become faster and more accurate.

Spec Changes in Five Stamps

Number-stamp a screenshot of your current application in the exact order changes should be applied. Add notes to each stamp describing what the change entails. Export the structured prompt and paste it into an AI coding assistant or share it with a human developer. The numbered sequence ensures that dependencies are respected, such as changing the database schema before updating the UI. This turns a messy list of requests into a clean, executable specification.

Is RedLinz really free forever?

Yes. The free tier gives you five markups per month forever with no credit card required. You can sign up and start annotating immediately. The free tier includes all twelve annotation symbols and the structured prompt export. The only limitation is the monthly markup count and the presence of a small watermark on exported images.

Do my images get uploaded to your servers?

No. All annotation processing happens entirely client-side in your browser. Your images, screenshots, and markup data never leave your device. RedLinz does not store, process, or transmit your visual content to any external server. This ensures complete privacy for sensitive design files and internal product screenshots.

Which AI tools does RedLinz work with?

RedLinz works with any AI tool that accepts text and image inputs. This includes Cursor, Claude Code, ChatGPT, Perplexity, Grok, and many others. The export format is universal, so you can use the same annotated screenshot and structured prompt across different tools depending on your task. There is no proprietary integration required.

What happens when I upgrade to Pro?

Pro removes all limits and watermarks. You get unlimited markups per month, and all exported images are clean without any watermark. Pro costs eight dollars per month or eighty-two dollars per year. You can upgrade at any time from your account settings, and the change takes effect immediately. There are no long-term contracts, and you can downgrade back to the free tier at any time.

RedLinz offers two simple pricing tiers. The Free plan gives you five markups per month forever with no credit card required. All twelve annotation symbols are included, and you get the structured prompt export. Exported images include a small watermark. The Pro plan costs eight dollars per month or eighty-two dollars per year. Pro removes all limits and watermarks, giving you unlimited markups and clean, professional exports. You can upgrade or downgrade at any time with no long-term commitment. Both plans include full client-side privacy and cross-platform AI compatibility.