Mini Tools Collection
Useful one-page tools for real work
ToolPatch is a growing collection of focused utilities. Each page handles one task with clear inputs, fast results, and practical outputs.
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Developer Tools
Featured
Barcode Generator
Generate CODE39 and EAN-13 barcodes as SVG output.
Barcode Generator creates scan-ready SVG barcodes for CODE39 and EAN-13 directly in the browser workflow. It is useful for inventory labels, internal IDs, packaging mockups, and test fixtures where you need deterministic machine-readable output. The tool validates format-specific input, auto-calculates EAN-13 check digits for 12-digit payloads, and surfaces clear errors when content is invalid. You can control module width and bar height to tune readability for printers and scanners. Use this for practical operational output; confirm print quality and scanner compatibility before production rollouts.
Developer Tools
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Cron Builder
Build cron expressions and ready-to-paste crontab lines from schedule fields.
Set minute/hour/day fields and generate cron expressions with command output for scheduling jobs.
Developer Tools
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Hash Generator
Generate MD5, SHA1, and SHA256 hashes from input text.
Instantly create common cryptographic hash outputs for strings and payload snippets. Useful for development workflows, debugging, and quick integrity checks.
Developer Tools
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HTTP Headers Checker
Fetch response headers for a URL using HEAD requests.
Inspect status code and HTTP response headers to validate caching, security, and delivery setup.
Developer Tools
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JWT Decoder
Decode JWT header and payload claims for debugging.
Paste a JWT token to decode Base64URL header and payload, inspect registered claims, and check timestamp fields quickly.
Developer Tools
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Password Generator
Generate secure random passwords with customizable rules.
Create strong passwords with configurable length and character sets.
Developer Tools
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Password Strength Checker
Evaluate password strength with score, entropy estimate, and improvement tips.
Check password quality using length, character classes, and common-pattern heuristics to quickly identify weak credentials.
Developer Tools
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Random String Generator
Generate random strings with configurable length and character sets.
Create random tokens for IDs, test data, and temporary secrets with optional uppercase, digits, and symbols.
Developer Tools
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Regex Tester
Test regular expressions with flags, matches, and capture groups.
Run regex patterns against text input and inspect match positions and captures quickly.
Developer Tools
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SHA256 Generator
Generate SHA256 hashes from plain text input.
Create deterministic SHA256 digests for checksums, signatures, and debugging workflows.
Developer Tools
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SQL Prettifier
Format SQL queries into readable or compact output.
Paste SQL and convert between pretty-printed and compact forms for debugging, reviews, and docs.
Developer Tools
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Unix Timestamp Converter
Convert unix timestamps to UTC datetime and back.
Translate epoch seconds and parseable datetime strings for logs, APIs, and debugging workflows.
Developer Tools
Featured
URL Encoder Decoder
Encode and decode URL strings for safe query and path handling.
Convert text to URL-encoded form and decode encoded strings for debugging links, query params, and integrations.
Developer Tools
Featured
XML Formatter
Pretty-print, compact, and validate XML quickly.
Format XML into readable indented output or compact form, and catch parse errors for faster debugging.
Developer Tools
AI Prompt Optimizer
Analyze and improve AI prompts for clarity and effectiveness.
Evaluate your AI prompts across clarity, specificity, and structure dimensions. Get real-time scores, identify vague language, and receive suggestions for improvement. This tool helps craft prompts that yield better, more consistent results from language models without requiring external APIs. Enter any prompt and receive instant analysis with actionable improvement suggestions. Works for ChatGPT, Claude, Gemini, and any LLM. Use this before sending important prompts to catch clarity issues and optimize for response quality.
Developer Tools
Base64 Encoder Decoder
Encode and decode Base64 text directly in browser.
Quick utility for API payload prep, debugging, and data transport checks.
Developer Tools
SSL Certificate Validator
Check SSL/TLS certificate validity and details.
Paste an SSL certificate or enter a domain to validate certificate chain, expiration date, key strength, and issuer details. Identifies warnings like upcoming expiration or weak cryptography. Supports PEM-formatted certificates and automatic domain lookups. Essential for DevOps teams managing certificate lifecycles and security compliance. Use this before deploying to catch certificate issues early and ensure uninterrupted HTTPS availability.
Developer Tools
User Agent Parser
Parse browser, OS, and device from user-agent strings.
Analyze a user-agent string and detect browser family, operating system, and device class.