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Few-Shot Example Builder

Turn input and output pairs into a clean, consistent few-shot prompt block.

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Quick Tool Overview

The Few-Shot Example Builder turns input and output pairs into a consistently formatted few-shot block — XML tags, labels, markdown, chat messages or JSONL — and checks the examples for the inconsistencies that make answers unpredictable.

What it does
Formats examples for few-shot prompting
You give it
Input and output pairs in any common layout
You get back
A clean few-shot block with an input slot
Best for
Classification, extraction and fixed output formats
AI Tools Free, unlimited use No sign-up Runs in your browser

About the Few-Shot Example Builder

Few-shot prompting means showing the model a handful of worked examples before the real input. It is the most reliable way to control output format, label names and tone — more reliable than instructions alone — and it only works if the examples are formatted consistently.

Paste your examples as Q: and A: pairs, two tab-separated columns from a spreadsheet, or blocks separated by blank lines. The builder formats them all the same way: XML tags, which Anthropic recommends for Claude; Input and Output labels; markdown headings; a chat messages array where each example becomes a user and assistant turn; or JSONL pairs. An empty slot for the real input can close the block.

It also checks the examples themselves. Outputs in different shapes — some JSON, some prose — are the most common reason a few-shot prompt gives inconsistent answers, and a single example tends to be copied rather than generalised from. Both are flagged, along with the token cost of the block.

Key features of the Few-Shot Example Builder

Five output formats

XML tags, labels, markdown headings, a chat messages array or JSONL pairs.

Flexible input

Q: and A: labels, tab-separated spreadsheet columns or blank-line blocks are all read.

Consistency checks

Outputs in mixed shapes and very uneven lengths are flagged before they confuse the model.

Named labels

Replace Input and Output with labels that describe your data, such as Ticket and Category.

Token cost per example

See what the block adds to every request before you commit to it.

How to use the Few-Shot Example Builder

  1. 1

    Paste your examples

    Q: and A: labels, tab-separated columns or blank-line blocks are all detected.

  2. 2

    Choose a format

    XML tags for Claude, labels or markdown for most models, chat messages for an API.

  3. 3

    Name the labels

    Use labels that describe the data, such as Ticket and Category, rather than Input and Output.

  4. 4

    Copy the block

    Paste it into your prompt, with the real input filling the slot at the end.

Frequently asked questions

Usually two to five. One example tends to be copied rather than generalised from, and past five or six the gains flatten while every call gets more expensive.

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