topskills

Claude.ai guide

Best agent Skills for Claude.ai

The best Skills for Claude.ai are the Anthropic document Skills — pdf, docx, xlsx, pptx — because the web app's core workflow is files in and files out, and these bundle tested scripts for the format edge cases improvised code gets wrong. Add frontend-design and web-artifacts-builder for building artifacts, and the marketing set (campaign-plan, content-creation, competitive-brief) if the people using it are not engineers. 31 of 191 catalogued Skills are verified on Claude.ai; the constraint is real and structural — there is no local filesystem or shell here.

Updated August 26, 2026 · first published August 19, 2026

Install first

pdf

The highest-scoring document Skill and the best match for how the web app is actually used — upload a file, get a real file back. Handles extraction, form filling, watermarking, and encryption, including the cases (encrypted files, scanned pages) that quietly defeat improvised code.

Best when: Any task where a real PDF is the input or the deliverable.

Install model

How Skills install on Claude.ai

  1. 1Download the Skill folder and zip it (the folder containing SKILL.md at its root).
  2. 2In Claude.ai, open Settings → Features → Skills.
  3. 3Upload the zip. The Skill becomes available across all your conversations.
  4. 4On Team and Enterprise, an admin can publish a Skill to the whole workspace so members get it without uploading it themselves.

Claude.ai runs Skills in a sandboxed cloud environment: they can read files you upload and produce files and artifacts back, but they cannot reach a local filesystem, run a dev server, or execute shell commands against your machine. Skill support requires a paid tier (Pro, Max, Team, or Enterprise).

Ranked

The shortlist

Ordered by what to install first for the common case, not by raw score. Every entry here carries verified Claude.ai compatibility — open the skill page for the composite score, licence, and full install commands.

SkillSourceScoreBest when
pdfOfficial52Any task where a real PDF is the input or the deliverable.
xlsxOfficial48A model or report where the recipient will edit the formulas, not just read the numbers.
frontend-designOfficial92Building an artifact anyone other than you will look at.
web-artifacts-builderOfficial52Interactive demos, prototypes, and one-off tools you want to share as a link rather than a repo.
pptxOfficial48Turning a document or a set of findings into a deck someone will present.
doc-coauthoringOfficial48Long-form documents where you own the argument and want help with structure and drafting.

See every skill verified on this agent, ranked by composite score, on the Claude.ai page.

Why these

Pick by pick

  1. 1
    pdf

    The highest-scoring document Skill and the best match for how the web app is actually used — upload a file, get a real file back. Handles extraction, form filling, watermarking, and encryption, including the cases (encrypted files, scanned pages) that quietly defeat improvised code.

  2. 2
    xlsx

    Produces spreadsheets with working formulas, formatting, and multiple sheets rather than a CSV wearing an .xlsx extension. This is the Skill that makes Claude.ai usable for finance and ops work.

  3. 3
    frontend-design

    Verified on Claude.ai and the highest-scoring Skill in the catalogue. Artifacts are a first-class output of the web app, and this is what stops them looking generated.

  4. 4
    web-artifacts-builder

    Self-contained HTML artifacts with React and shadcn/ui and no build step — exactly the shape the Claude.ai artifact surface can render and share.

  5. 5
    pptx

    Generates real decks from an outline, including layouts and speaker notes, and reads existing ones. The most reliably useful Skill for the non-engineering half of a Claude.ai workspace.

  6. 6
    doc-coauthoring

    A method for writing with the model rather than having it write for you — structure, revision, and voice control. Pairs with docx so the output is a real document.

Limits

What this agent cannot do

Claude.ai is the most constrained Skill surface we catalogue, and the constraints are structural rather than temporary: no local filesystem, no shell, no dev server, so testing Skills, deploy Skills, and anything that drives local tooling cannot work here regardless of the SKILL.md. 31 of 191 Skills are verified — the set that fits the upload-in, artifact-out model. Skill support also requires a paid tier. If your workflow needs a live codebase, the answer is Claude Code, not a different Skill.

FAQ

Common questions

How do I add a Skill to Claude.ai?

Settings → Features → Skills, then upload the Skill folder as a zip with SKILL.md at its root. It then applies across all your conversations. Team and Enterprise admins can publish Skills workspace-wide.

Do I need a paid plan for Skills on Claude.ai?

Yes — Skill support is a paid-tier feature (Pro, Max, Team, Enterprise). The Skills themselves are mostly free and open source; the platform capability is what is gated.

Why do fewer Skills work on Claude.ai than in Claude Code?

Because the sandbox has no local filesystem or shell. A Skill that runs a test suite, starts a dev server, or deploys needs capabilities the web app does not grant. The document and writing Skills translate cleanly; the tooling Skills do not.

Can my whole team share one set of Skills?

On Team and Enterprise, yes — an admin publishes Skills to the workspace and members get them automatically, which is the practical way to standardise output across a non-engineering team.

Other agents

Same question, different agent

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