Can it prove a text is AI-generated?

No tool can. The slop check does not guess who wrote a text: it points at the sentences that read as machine-written padding, which is how most people tell. People write padding too.

Does it work in other languages?

Yes. The judgment is about what a sentence does, not about English words like “delve”, so it holds in every language.

It only reads; nothing is rewritten. That costs us little, so it costs you nothing.

How to tell if text is AI-generated

See which sentences read as AI slop

Paste any text. The slop check marks every sentence that reads as machine-written padding and names why, which is how most people tell if text is AI-generated. It never rewrites and never uses up a page.

Check for slop

Free on every plan. It never uses up a page.

A magnifying glass highlights padding in a document.

Made for

Before you send or publish something drafted with AI
Reviewing writing from a team, an agency or a model
Checking your own prose for habits you picked up

What it flags

Example: Slop 71 · 5 of 7 sentences flagged

In today’s fast-paced digital landscape, it’s important to note that customer retention isn’t just a metric.Slop: filler It’s a mindset.Slop: set-piece rhetoric Our Q3 analysis delves into the key drivers behind this crucial shift.Slop: inflated wording After careful consideration of the data, we found that churn fell from 6.2% to 4.8% between July and September. This represents a significant and meaningful improvement that underscores the transformative power of our onboarding redesign.Slop: inflated wording Moving forward, we recommend extending the new flow to all 3 pricing tiers by 15 November. In conclusion, by embracing a customer-first approach, we can unlock sustainable growth and drive lasting value for all stakeholders.Slop: recap

How Slop check works

Step 01
Every sentence is read
Each sentence is judged on what it does in its passage, not on which words it uses, so it works in every language.
Step 02
Padding is named
Filler, inflated wording, hedging, set-piece rhetoric, recap or hype: each flagged sentence carries its reason.
Step 03
You get a score
The share of sentences that are padding, from 0 (none) to 100 (all of it).
Step 04
Fix it in one click
Run De-slop on the same text to cut what was flagged, with every fact checked.

Options

Free: Slop checks never use up a document, on any plan.
Any source: Paste text, enter a web address or upload a PDF.

From code, terminal or agent

# REST API
curl https://readable.md/api/v1/transform \
  -H "Authorization: Bearer $READABLE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "tool": "slop-check", "text": "…" }'

# Command line
pbpaste | readable check

# MCP tool: slop_check

API, MCP and CLI docs

Questions

Can it prove a text is AI-generated?: No tool can. The slop check does not guess who wrote a text: it points at the sentences that read as machine-written padding, which is how most people tell. People write padding too.
Does it work in other languages?: Yes. The judgment is about what a sentence does, not about English words like “delve”, so it holds in every language.
Why is it free?: It only reads; nothing is rewritten. That costs us little, so it costs you nothing.