Prompt Variable Replacer
Fill {{variables}} in prompt templates with a live preview. Paste a template, fill the detected variables, and copy the final prompt instantly. Everything runs in your browser — nothing is sent to a server.
Utilisation Prompt Variable Replacer
Remplaceur de variables de ligne de commande
Remplissez les champs de remplacement dans n'importe quel modèle de prompt, puis copiez le prompt final. Tout s'exécute dans votre navigateur : aucune donnée n'est envoyée à un serveur.
Cliquez sur une case pour la remplir. Appuyez sur Entrée pour enregistrer, sur Échap pour annuler.
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How to Use This Tool
Paste any prompt template that uses {{variable}} placeholders, or click Load sample to try a ready-made example. The tool detects every placeholder and builds a list of fields below.
1. Paste your template
Write or paste a prompt with placeholders such as {{role}}, {{topic}} or {{length}}. Placeholders must contain only letters, digits and underscores, and must start with a letter or underscore.
2. Fill the variables
Each detected variable gets its own input field. Type a value for each one, or click Fill all with sample to add realistic values instantly. Use Bulk paste to paste many values at once in a name=value format, one per line.
3. Copy the final prompt
The final prompt updates live as you type. Filled placeholders are highlighted in green; empty ones stay visible in amber. Copy the result, copy the raw template, or save the output as a .txt file.
Features
- Live token and character counter for the final prompt
- Malformed placeholder warnings (empty, invalid names, unclosed braces)
- Per-variable usage count when a placeholder appears more than once
- Auto-save: your template and values are saved in the browser
- Presets: save and reload template versions
- Undo after clearing values
FAQ
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