AI
RAG Chunk Previewer
Preview chunk size, overlap, and token estimates so retrieval inputs stay readable and embedding-friendly.
Source documentChunk candidate
Paste the raw text you want to split into retrieval chunks.
Chunk controlsWord-based preview
Approximate words per chunk in this local preview.
Approximate words repeated between adjacent chunks.
UtilityHub is a browser-first developer and AI utility suite. It keeps pasted prompt drafts, diffs, payloads, headers, schemas, and eval snippets local to the page. Teams use it for structured output design, guardrail checks, and workflow validation without standing up
guardrail checks, and workflow validation without standing up a backend. UtilityHub is a browser-first developer and AI utility suite. It keeps pasted prompt drafts, diffs, payloads, headers, schemas, and eval snippets local to the page. Teams use it for structured
to the page. Teams use it for structured output design, guardrail checks, and workflow validation without standing up a backend. UtilityHub is a browser-first developer and AI utility suite. It keeps pasted prompt drafts, diffs, payloads, headers, schemas, and eval
prompt drafts, diffs, payloads, headers, schemas, and eval snippets local to the page. Teams use it for structured output design, guardrail checks, and workflow validation without standing up a backend.
Retrieval planning
Chunking tradeoffs shape both retrieval quality and cost. This local preview helps you tune chunk size before indexing.
Use this tool when
These are the practical situations where this workflow usually earns its keep.
You are still shaping the prompt, schema, trace, eval case, or safety posture and want a fast local iteration loop first.
You need a review-friendly artifact before sending work into a live model, batch eval, or agent integration.
You want to compare or inspect AI workflow material without exposing internal prompts or source text more widely than necessary.
Prompt and output iteration
Local AI tools shorten the cycle between seeing a weakness and tightening the prompt, schema, or answer shape that caused it.
Eval and safety preparation
Teams can build rubrics, adversarial cases, or review datasets before they invest in heavier automation or model-backed test runs.
Trace and workflow debugging
A smaller local surface helps reviewers understand tool-call churn, unsupported claims, context drift, or grounding gaps before they open a larger incident or quality review.
Common mistakes to avoid
These are the checks that usually keep the output useful instead of misleading.
Treating heuristic local checks as definitive proof of model quality or safety.
Testing only polished examples instead of the messy or adversarial inputs users will actually create.
Moving prompts or traces into external systems before checking policy and data handling expectations.
Learn how to use this tool
Preview chunk boundaries, overlap, and token estimates for retrieval workflows. This guide is aimed at AI workflow design work where teams need clearer prompts, safer reviews, or better eval preparation before spending tokens or shipping behavior.
Read the guideTell us what is missing
If this flow helped only partly, leave feedback so we can understand the missing step or edge case.
Leave feedbackRequest the next tool
Use the wishlist to suggest the next utility, workflow, or improvement that would complete this job to be done.
Open wishlistRelated tools
These tools often appear right before or right after this workflow.
Prompt Studio
Assemble reusable prompts with goals, variables, constraints, and output instructions.
Open toolPrompt Diff Checker
Compare two prompt versions to inspect changed wording, constraints, and emphasis.
Open toolPrompt Eval Scorecard
Score AI outputs for format, groundedness, safety, and completeness with a local rubric.
Open tool