For Anthropic Claude

Claude Prompt Builder

Build XML-tagged prompts that Claude Opus 4.7 and Claude Sonnet 4.6 actually follow. Reliable structure, repeatable output, fewer retries.

  • XML-structured prompts tuned for Claude
  • Templates for Claude Opus 4.7 and Claude Sonnet 4.6
  • Migrate ChatGPT prompts to Claude in one click
  • Chain Claude prompts into multi-step workflows

Free plan available · No credit card required

Live preview
Compose a Claude prompt with structured tags
XML structuring
Automatic <context>, <instructions>, <example>, and <output_format> tagging.
Claude-tuned defaults
Best-practice scaffolds from Anthropic's prompt engineering guidance, built in.
Few-shot examples
Add reference examples that Claude follows precisely — no more drift.
Features

Everything you need for Claude prompts

XML structuring

Automatic <context>, <instructions>, <example>, and <output_format> tagging.

Claude-tuned defaults

Best-practice scaffolds from Anthropic's prompt engineering guidance, built in.

Few-shot examples

Add reference examples that Claude follows precisely — no more drift.

Cross-model migration

One-click conversion from ChatGPT or Gemini prompts into Claude format.

Reusable templates

Save Claude prompts to your library and fork variants for different tasks.

Workflow chaining

Pipe Claude outputs into downstream Claude or ChatGPT steps.

Use cases

Built for real workflows

Long-form research

Leverage Claude Opus 4.7's large context for legal, medical, and technical research.

Document analysis

Summarize, extract, and classify long documents with high accuracy.

Code review

Use Claude Opus 4.7's reasoning for thorough code review with structured findings.

Customer support

Build support workflows with strict tone, policy, and escalation rules.

How it works

From prompt to production in minutes

  1. Step 1
    Describe the task

    Tell us what you want Claude to do — plain English.

  2. Step 2
    Get structured XML

    InstructFlow AI builds the tagged prompt with examples and constraints.

  3. Step 3
    Save and chain

    Reuse the prompt across workflows or share it publicly.

Ready to ship better AI workflows?

Join builders using InstructFlow AI to optimize prompts, chain steps, and share reusable workflows.

FAQ

Frequently asked questions

What is a Claude prompt builder?

A tool that structures prompts using Claude's preferred XML tags (<context>, <instructions>, <example>) so Anthropic models follow your intent more reliably.

Which Claude models are supported?

The current Anthropic line: Claude Opus 4.7 for deep reasoning and long-context work, and Claude Sonnet 4.6 for synthesis, drafting, and high-volume tasks.

Why XML for Claude prompts?

Anthropic recommends XML tagging because Claude is trained to respect it. Structured prompts produce dramatically more consistent output than plain text — which means fewer retries.

Can I migrate ChatGPT prompts to Claude?

Yes. Paste your existing prompt and InstructFlow AI rewrites it in Claude's preferred structure.