Tools starting with J
24 free online tools on AltFTool start with J, listed alphabetically. Every one is free, needs no sign-up and runs in your browser.
Compare two texts as token sets and get the Jaccard index, distance, Dice, overlap and cosine coefficients.
CalculatorsFormat, minify, and inspect JavaScript snippets locally.
DeveloperGenerate correct JDBC connection URLs for PostgreSQL, MySQL, Oracle, SQL Server, H2 and SQLite with driver-specific syntax.
DeveloperJob Board Profile Cleanup Guide
Scan pasted résumé text for personal data that should not sit on a public job portal — government IDs, phone, address, date of birth and more — get an exposure score, and copy a redacted version.
Security & PrivacyCompare multiple job offers side-by-side with intelligent scoring, financial breakdown, and recommendations to find the best opportunity.
ProductivityReview a job offer locally for candidate-payment, money-mule, contact mismatch, compensation, urgency, and identity-pressure signals.
Security & PrivacyMerge photo and signature into a single image. Perfect for online applications (UPSC, bank, academic exams) requiring specific layout sizes and file KB limits.
Image & VideoPhase-wise checklist for medical exam, police verification, attestation forms and day-one joining paperwork.
ProductivityGenerate random jokes from multiple categories with favorites, search, and export options.
LifestyleFormat, beautify, and clean minified or messy JavaScript code with options to adjust tab indentation size and copy output.
DeveloperCompare two JSON files, URL payloads, or text inputs side-by-side with semantic difference highlighting.
DeveloperValidate, format, minify, and convert JSON snippets.
DeveloperFlatten nested JSON into dot-notation keys and rebuild the nested structure, with bracket or dot array styles.
ConvertersRegular formatted display of JSON, plus automatic formatting/conversion for API interface testing (GET, POST, POST-JSON).
DeveloperJSON Mutual Conversion Postman Parameters Tool
Convert JSON to Postman query params, form-data, x-www-form-urlencoded bodies, raw JSON, dynamic headers, and cURL with real-time two-way parsing.
DeveloperParse JSON data and display it in a readable format
DeveloperMap nested JSON into paths, inferred relationships, references, and structure metrics locally in your browser.
DeveloperConvert pasted JSON or uploaded JSON files into clean CSV and Excel-ready spreadsheet downloads.
DeveloperGenerate production-ready Go structs from JSON with nested objects, arrays, nullable fields, JSON tags, copy, download, and local history.
DeveloperConvert JSON into readable TOML with proper [table] sections, [[array of table]] syntax and safely quoted keys.
ConvertersConvert JSON objects recursively into type-safe TypeScript interfaces or type statements with formatting options.
DeveloperConvert JSON objects and arrays into readable YAML.
DeveloperGenerate real anchor, smooth scroll, route navigation, button jump, and reusable navigation snippets instantly.
DeveloperDecode JWT header and payload claims instantly in the browser.
Developer