PromptFork

Free AI prompt tools

Grade, build, and sharpen your prompts in the browser — no sign-up — then fork proven ones from the PromptFork library.

FORGE Prompt Grader

Paste any prompt, get a 0–100 score against the five FORGE pillars, and a rebuilt, stronger version to copy or fork.

Library Starter

Enter your role and core tasks, get a starter pack of ready-to-fork prompts organized like a personal library.

ChatGPT Prompt Optimizer

Paste a weak ChatGPT prompt and watch it become a role-framed, constraint-set, format-locked one — before and after.

Claude Prompt Converter

Reformat any prompt into Claude’s preferred structure — clean XML-style sections and explicit instructions.

Gemini Prompt Tuner

Tune a task into a prompt built for Gemini’s long-context and multimodal strengths.

Grok Prompt Lab

Build a prompt tuned to Grok’s candid voice and real-time strengths.

Image Prompt Composer

Compose a rich image prompt — subject, style, lighting, lens, mood — plus a matching negative prompt.

Nano Banana Edit-Prompt Builder

Write precise image-edit instructions that change one thing and preserve the rest.

Suno Song Prompt Builder

Turn genre, mood, and instruments into a Suno style tag and a structured lyric scaffold.

Prompt Example Remixer

Browse example prompts by category, then remix one to fit your exact situation.