Barcode Generator
Generate CODE39 and EAN-13 barcodes as SVG output.
Enhanced Category
Developer Tools Tools
Developer tools for formatting, decoding, validating, generating, and inspecting data used in everyday implementation and debugging work.
Start with these tools
Use this category when you need a focused browser tool for a narrow development task: formatting JSON or SQL, decoding tokens, checking headers, generating hashes, testing regexes, or preparing data for handoff.
Cron Builder
Build cron expressions and ready-to-paste crontab lines from schedule fields.
Hash Generator
Generate MD5, SHA1, and SHA256 hashes from input text.
HTTP Headers Checker
Fetch response headers for a URL using HEAD requests.
JWT Decoder
Decode JWT header and payload claims for debugging.
Password Generator
Generate secure random passwords with customizable rules.
Common workflow
- Paste or enter the smallest reproducible input that demonstrates the problem.
- Run the formatter, decoder, checker, or generator and inspect the transformed output.
- Copy the result into your editor, test case, issue, or documentation with enough context to reproduce it.
- Avoid pasting secrets, private keys, production tokens, or confidential payloads into any browser-based utility.
Related collections
Full Developer Tools tool list
Barcode Generator
Generate CODE39 and EAN-13 barcodes as SVG output.
Cron Builder
Build cron expressions and ready-to-paste crontab lines from schedule fields.
Hash Generator
Generate MD5, SHA1, and SHA256 hashes from input text.
HTTP Headers Checker
Fetch response headers for a URL using HEAD requests.
JWT Decoder
Decode JWT header and payload claims for debugging.
Password Generator
Generate secure random passwords with customizable rules.
Password Strength Checker
Evaluate password strength with score, entropy estimate, and improvement tips.
Random String Generator
Generate random strings with configurable length and character sets.
Regex Tester
Test regular expressions with flags, matches, and capture groups.
SHA256 Generator
Generate SHA256 hashes from plain text input.
SQL Prettifier
Format SQL queries into readable or compact output.
Unix Timestamp Converter
Convert unix timestamps to UTC datetime and back.
URL Encoder Decoder
Encode and decode URL strings for safe query and path handling.
XML Formatter
Pretty-print, compact, and validate XML quickly.
AI Prompt Optimizer
Analyze and improve AI prompts for clarity and effectiveness.
Base64 Encoder Decoder
Encode and decode Base64 text directly in browser.
SSL Certificate Validator
Check SSL/TLS certificate validity and details.
User Agent Parser
Parse browser, OS, and device from user-agent strings.
FAQ
What are Developer Tools on ToolPatch for?
They handle small implementation tasks such as formatting, decoding, validating, generating, and inspecting data without opening a full IDE workflow.
Can I paste production secrets into these tools?
No. Treat browser utilities as convenience tools and avoid pasting secrets, access tokens, private keys, customer data, or confidential payloads.
How should I use generated developer outputs?
Review the output, test it in your actual code path, and keep enough input context so teammates can reproduce the result.
How many tools are in this collection?
This category currently includes 18 focused tools, with the most practical starting points shown first.