Context Window Packer
Pack prompt segments into a fixed token budget while preserving high-priority and required instructions.
Budget usage: 0/7400 tokens0.0%
0
Total Segments
0
Included
0
Excluded
Packed prompt
Excluded segments
Nothing excluded.
About This Tool
Context Window Packer helps fit instruction blocks into finite context. It is useful for long system prompts, RAG assembly, and multi-part tool instructions where token budgets are strict.
Frequently Asked Questions
Is token count exact?
No. It is a heuristic estimate for planning.
How do required segments work?
Prefix a line with !. Required lines are packed first.
Is prompt text uploaded?
No. All packing logic runs in your browser.
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Before This Tool
Prompt Diff OptimizerCompare prompt revisions, estimate token delta, and spot removed constraint lines.Hallucination Risk ChecklistEstimate hallucination risk from prompt/context quality and suggest guardrail mitigations.Prompt Guardrail Pack ComposerCompose reusable refusal, citation, uncertainty, and output guardrail packs for system prompts.
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