Free / browser-only / editable budget

Know when your AGENTS.md is getting too large.

Paste an instruction file, set the byte budget that applies to your environment, and see the exact UTF-8 size, line count, and remaining headroom. The 32,768-byte starting value is editable planning input, not a universal platform limit.

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Instruction file contents

Your text remains in this browser tab. The page has no submission endpoint, analytics, storage call, or external script.

Editable byte budget

Verify the applicable limit in the tool or agent configuration you actually use.

Waiting for text Paste a file to calculate its budget.

UTF-8 bytes: 0
Characters: 0
Lines: 0
Budget used: 0%

Measurement only. This checker does not judge instruction quality, precedence, or tool compatibility.

One-file paid next step

Over budget and unsure what to remove?

The fixed $149 Single-File Agent Instructions Correction returns a review-ready replacement, unified diff, evidence notes, and acceptance checks for one existing public-repository instruction file. Written scope and settled PayPal Business payment are required before work.

See the $149 scope & sample Open the active $750 self-serve audit

Measure the exact bytes

UTF-8 byte count is not the same as JavaScript character count. This checker reports both and does not estimate tokens.

Use the right budget

Limits can differ by agent, wrapper, configuration, and combined instruction chain. Replace the planning value with your verified limit.

Preserve repository truth

Shrinking a file should not invent commands, paths, guarantees, or safety claims. Keep shared facts evidenced and tool companions thin.