Shell Script Generator
Commercial use OK
380+ models
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No sign-up needed
Model:
+ GPT-5, Claude, Gemini
Describe what your script should do and get a shellcheck-clean Bash 5+ script - strict mode, proper quoting, arrays, trap cleanup, mktemp temp files. 8 style presets including POSIX-portable, systemd daemon, cron job, installer, and bats-core tests.
Explanation
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Result
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Generate Bash and shell scripts with free AI. Automate tasks and workflows.
How to Use Shell Script Generator
1
Enter your input
Type text, upload a file, or describe what you want. No account needed.
2
Click generate
Our AI processes your request in seconds using the best open-source models.
3
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Download, copy, or share your result. Free for personal and commercial use.
Use this tool via API
Automate this tool from your own code. OpenAI-compatible REST endpoint, Bearer-token auth, no extra SDK required. Token costs match the web interface.
curl -X POST https://api.free.ai/v1/chat/ \
-H "Authorization: Bearer sk-free-..." \
-H "Content-Type: application/json" \
-d '{"model": "qwen-coder", "messages": [{"role": "user", "content": "Write a Python function that reverses a string."}]}'Shell Script Generator — FAQ
Production-grade Bash 5+ scripts that pass shellcheck cleanly - strict mode (set -euo pipefail), proper quoting, arrays where lists matter (not space-separated strings), trap handlers for cleanup, mktemp for temp files. 8 style presets (Bash 5 strict / POSIX sh portable / Zsh / Systemd-launched daemon / Cron job / CI helper / Installer / Test with bats-core).
Yes - a typical script with arg parsing + main logic + cleanup costs ~1,200 tokens on Qwen 3 Coder, inside the 2,500 anonymous / 10,000 signed-up daily pool. Premium Claude Sonnet / GPT-5 are worth it for complex multi-script systems where state needs to flow between processes.
GitHub Copilot ($10 individual / $19 business / $39 enterprise) is decent at line-by-line shell completion but often misses pitfalls (unquoted vars, missing exit codes). Cursor ($20/mo) does better with whole-file context. Our tool is one-shot - describe what the script should do, get a shellcheck-clean script with proper error handling.
That is the bar - every output is structured to pass shellcheck -S warning cleanly. The free Qwen tier gets there ~90% of the time; the misses are usually SC2086 (unquoted) on intentional word-splitting cases. Always run shellcheck on the output before deploying. Premium models catch more preemptively.
Pick the POSIX sh portable preset. Output avoids bashisms - no double brackets (use single brackets), no arrays (use whitespace-separated strings or temp files), no parameter-expansion case conversion (use tr). Targets dash / busybox sh - works on Alpine, Debian /bin/sh, OpenWrt, etc.
Pick the Bash 5 strict preset. Output uses associative arrays (declare -A), parameter-expansion case conversion, mapfile -t for safe line-reading, printf -v for variable assignment from format strings, process substitution where pipes would lose state. set -euo pipefail always at the top.
Pick the Systemd-launched daemon preset. Output includes the .service unit file with proper [Unit] dependencies, [Service] type / restart / user / hardening flags (PrivateTmp, ProtectHome, NoNewPrivileges), and the script the service runs. Journalctl-friendly logging via printf to stdout (no log files).
Pick the Cron job preset. Output is the crontab line + the script - handles cron PATH gotchas (cron does not source .bashrc), uses absolute paths, exports needed env vars at the top, locks via flock to prevent overlap, redirects output to a log file or syslog. MAILTO line included or noted.
Yes - jq for JSON (never grep on JSON), grep -F for fixed strings, sed -i.bak for in-place edits with backup, find -print0 piped to xargs -0 for null-safe iteration over filenames. Avoids parse-with-regex for structured formats - uses the right tool per format.
Yes - set -euo pipefail at the top, every command checked or chained with logical-or, traps for cleanup on signal exit, explicit exit 1 with a stderr error message on failure paths. No silent failures.
Pick the Test with bats-core preset. Output uses bats setup / teardown lifecycle, @test description blocks, run command capture + status / output assertions, helper functions in a separate file. Compatible with bats-core 1.10+.
Yes - POST to /v1/chat/ with the same system prompt this page builds. Useful for Ansible playbook helpers, CI pipeline generators, or installer scripts. Bearer auth, rate-limited. Docs at /api/.
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