Working out of Bengaluru, Hyderabad, Chennai, Pune, or remotely across India, developers share a common set of browser-based utilities they keep pinned in their tabs. No installation, no npm install, no licensing fees. These ten tools from ToollyX are the ones that actually save time on the job.
JSON Formatter & Validator
Every API response, webhook payload, and config file is JSON these days. The ToollyX JSON Formatter takes minified JSON — unreadable in a single line — and pretty-prints it with syntax highlighting, collapsible nodes, and line numbers. It validates simultaneously: paste malformed JSON and the exact error position appears immediately. Essential for debugging API responses from AWS, Razorpay, Stripe, and every REST endpoint you hit.
Regex Tester
Regular expressions are notoriously hard to debug mentally. The Regex Tester highlights matches in real-time as you type the pattern, shows all capture groups, flags (g, i, m, s), and tells you exactly what matched and where. Write regex for validating Indian phone numbers (10 digits starting with 6–9), PAN format (AAAAA9999A), GST numbers (22AAAAA0000A1Z5), or Aadhaar — and test it against real samples before shipping.
Base64 Encoder / Decoder
Two tabs: Text and File. Text mode encodes or decodes instantly with URL-safe mode (for JWT-related work) and line-wrap-76 (for MIME/email). File mode lets you drop any file and get its Base64 representation — useful for embedding small images in CSS, creating data URIs, or debugging Base64-encoded API payloads. Swap button flips the input/output and switches mode automatically.
Hash Generator (MD5/SHA-256)
Generate MD5, SHA-1, SHA-256, and SHA-512 simultaneously from text or a dropped file. Uses crypto.subtle.digest() — the native browser WebCrypto API — for SHA variants (same as what browsers use internally). Useful for verifying downloaded file integrity, generating checksums for deployment artifacts, and testing hash-based caching keys. File mode works entirely client-side — no file upload.
UUID Generator
Generate UUID v4 values instantly — single or bulk (up to 100 at once). UUID v4 uses crypto.randomUUID() where supported, falling back to a Uint8Array implementation. Copy individual UUIDs or the entire list. Used for database primary keys, idempotency keys in payment APIs, test data generation, and any situation where you need a guaranteed unique identifier without a running sequence.
URL Encoder / Decoder
Encodes special characters to percent-encoding (%20, %2F, etc.) and decodes them back. Critical for building API requests with special characters in query parameters, debugging OAuth redirect URIs, and constructing webhook URLs with query strings. Supports both encodeURIComponent style (encodes everything except unreserved chars) and component-level encoding.
Epoch / Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates instantly. Essential for debugging JWT expiry fields (exp, iat), database timestamps, log file entries, and any API that returns epoch times. Converts to and from UTC, shows the timestamp in multiple time zones, and accepts both second-precision (10 digits) and millisecond-precision (13 digits) Unix times.
Cron Expression Parser
Paste any cron expression and see its next 10 scheduled runs in plain English. Vital for verifying AWS Lambda schedules, GitHub Actions cron triggers, and any background job scheduler before deployment. Supports standard 5-field cron (minute/hour/day/month/weekday) and explains each field. No more "is '0 9 * * 1' every Monday at 9am or every first-of-month?" confusion.
JSON to CSV / CSV to JSON Converter
Bidirectional conversion between JSON arrays and CSV format. JSON to CSV flattens nested objects with dot notation, handles arrays consistently, and generates a header row from keys. CSV to JSON parses quoted strings, escaped commas, and mixed types correctly. Useful for importing/exporting data between APIs and Excel/Sheets, preparing seed data, and transforming database exports.
Meta Tag Generator
Generate complete HTML meta tags — Open Graph, Twitter Card, standard SEO meta — from a form interface. Preview how your page will appear in Google search results, Facebook shares, and Twitter/X cards. Copy the complete <head>snippet ready to paste. Eliminates the need to remember every OG property and Twitter card attribute by hand every time you create a new page.
Honourable Mentions
The XML Formatter and XML to JSON converter deserve a mention for anyone working with SOAP services, Indian government APIs (many still use XML), or Android resource files. The Color Converter (HEX ↔ RGB ↔ HSL) is indispensable when matching design tokens from Figma to CSS.
JSON, Base64, UUID, Regex, Epoch, and more — all browser-based.