Free, local-first developer utility
Paste a stack trace, build error, traceback, or CI failure. ContextClean removes common noise, deduplicates repeated lines, flags likely secrets, and gives you a smaller result to review before sharing.
Noise cut
62%
Signal kept
4 lines
Ready for
AI prompt
Browser workbench
Your text is processed by JavaScript in this browser tab. It is not sent to a ContextClean server by this tool.
Input
0 lines
Output
0 lines
Removed
0 lines
Reduction
0%
A review step, not a black box
ContextClean uses transparent pattern matching. It removes known low-signal messages for the selected log type, removes exact duplicate lines, and optionally replaces common credential patterns. It does not diagnose the bug, execute code, or know which application-specific line matters most.
Noisy terminal output, stack trace, or CI transcript.
Remove repeated and low-signal lines.
Check accuracy and sensitive data manually.
Use a shorter issue, PR comment, or AI prompt.
AI NEWS RADAR
Recent model, research, coding, open-source, and safety updates. Every item links to the original publisher; no recycled rumor posts.
See how four GitHub agent apps can help you scope, secure, roll out, and ship a feature across the SDLC–all without leaving GitHub. The post How to bring your software delivery workflow into GitHub with agent apps appeared first on The GitHub Blog . ]]>
A path, a fence, a knot. MindTopo sets a new benchmark for testing how AI understands topological relationships and highlights new opportunities to strengthen spatial reasoning and planning. The post MindTopo reveals VLMs’ spatial reasoning abilities appeared
Read the official announcement from Hugging Face.
Remove setup chatter and repeated framework frames while keeping the failed command, file, and error.
Read the guide
Shorten Node.js, Python, React, and TypeScript traces without flattening the useful call path.
Read the guide
Turn a long pipeline transcript into a smaller report for a teammate, issue, or AI assistant.
Read the guide
Better input
Add the command or route that failed, the behavior you expected, and the most relevant recent change. Those facts often matter more than another hundred lines of framework output.
Ask for a specific outcome such as the likely root cause, the next diagnostic check, or the smallest safe fix. This gives a teammate or AI assistant a clearer task.
Safer sharing
Logs may contain access tokens, customer identifiers, internal URLs, file paths, request payloads, or source code. Secret detection helps identify common formats but cannot understand every private value.
If a log contains regulated, confidential, or production data, do not paste it into a public website or third-party AI system.
Frequently asked questions
The cleaner on this page runs in your browser and does not send the pasted log to a ContextClean server. Third-party browser extensions or services remain outside our control.
No automated detector catches every credential format. Treat the warning as an extra check and manually review the text before sharing it.
A line that looks repetitive may still contain timing, environment, or call-order context. Compare the output with the original and restore anything needed to reproduce the failure.
The cleaned output is plain text, so it can be used with ChatGPT, Claude, Cursor, Codex, an issue tracker, or a teammate conversation.
Community discussion
Discuss prompt failures, misleading stack frames, context trimming, and safer ways to share a technical problem. Discussions are public and moderated through the ContextClean GitHub repository.
AI coding field notes
Explore invented APIs, dependency bonfires, symptom patches, version amnesia, AI black-hat translations, a hallucination-risk checklist, debugging Bingo, and community-submitted roasts.
Enter the field notesDAILY AI ROAST
2026-08-15 · #20679The AI saw an undefined value.
It recommended defining it. Computer science advanced another step.
Data-flow insightHUMAN TRANSLATION
Trace where the value became invalid.
One original debugging joke is selected from the maintained ContextClean library using the current date in Asia/Shanghai. It remains stable for the day and changes automatically after midnight.
PROMPT READINESS
72
Missing: recent change and checks already completed
Prompt clinic
Score the evidence in your prompt, detect common credential patterns, generate a stronger structure, and practice five realistic diagnostic decisions with immediate explanations.
Open the prompt clinic