Navorika toolkit
Web Developer Tools
Handle common web-development checks without sending working data to an unnecessary server. Use the groups below to move from data inspection to testing and publishing tasks.
33 available tools · 5 workflow stages
JSON and data conversion
Format, validate, compare, flatten, and convert JSON, CSV, and encoded text.
JSON Formatter
View, edit, and format JSON data online free. Parse and validate JSON with powerful editing tools.
JSON Schema Validator
Validate JSON data against a documented browser-based JSON Schema subset with readable error paths.
JSON Diff & Compare Tool
Structurally compare two JSON documents and find added, removed, changed and unchanged values at nested paths.
JSON to CSV Converter & Nested JSON Flattener
Convert nested JSON into CSV, flatten object keys into columns, preview the result and download CSV locally in your browser.
CSV to JSON Converter
Convert properly quoted CSV into formatted JSON with delimiter controls, header handling, type inference, preview and download.
Base64 Encoder & Decoder
Encode UTF-8 text to Base64 or decode Base64 back to UTF-8 text locally.
URL Encoder & Decoder
Encode and decode URLs or URL components locally with copy, swap, clear and malformed-input handling.
HTML Entity Encoder & Decoder
Encode reserved HTML characters and decode named or numeric HTML entities safely as plain text.
Networking and schedules
Plan IPv4 ranges and subnets, generate MAC addresses, and understand cron schedules.
CIDR, Subnet & Wildcard Mask Calculator
Convert IPv4 CIDR notation into subnet masks, Cisco wildcard masks, network and broadcast addresses, host ranges and address counts.
IP Range Calculator
Calculate IPv4 range size, boundaries, smallest containing CIDR and an exact CIDR block decomposition.
VLSM Subnet Calculator
Allocate non-overlapping variable-length IPv4 subnets largest-first from usable-host requirements.
MAC Address Generator
Generate random unicast MAC addresses using Web Crypto with local-bit, case and separator controls.
Cron Next Run Calculator
Validate standard five-field cron expressions and calculate upcoming runs in common IANA time zones.
Cron Expression Humanizer
Validate cron expressions, translate schedules into plain English, and preview upcoming run times.
Unix Timestamp Converter
Convert Unix seconds or milliseconds to a local date and time in your browser.
HTTP Status Code Lookup
Search common standardized HTTP status codes by number, phrase, class, meaning, use and caveat.
Tokens and identifiers
Generate identifiers and QR codes, inspect JWT payloads, and use browser cryptography.
UUID Generator
Generate UUID v4 and UUID v7 identifiers online. Create single or bulk UUIDs with formatting, casing, copy, TXT and CSV export.
JWT Decoder
Decode JWT header and payload JSON locally without verifying the token signature.
QR Code Generator
Generate colored QR codes or decode a QR code from an uploaded image locally.
Web Crypto Studio
Generate SHA-256 hashes, cryptographic random passwords, and UUID v4 identifiers locally.
Publishing and SEO
Prepare responsive CSS, metadata, campaign links, crawler rules, and reusable web assets.
Aspect Ratio Padding Calculator
Calculate CSS aspect ratios, responsive padding percentages, and copy-ready aspect-ratio code.
CSS clamp() Font Size Generator
Generate responsive fluid typography with CSS clamp() from minimum and maximum font sizes and viewport widths.
Meta Tag Generator
Generate basic HTML, Open Graph, and Twitter card metadata locally.
Robots.txt Generator
Generate a simple robots.txt block for one user-agent and disallow path.
UTM Builder
Add campaign source, medium, and name parameters to a valid URL.
Webmaster SEO Tools
Explore browser-based SEO utilities for campaign URLs, page metadata, and crawler directives.
CSS Gradient Generator
Build a two-color linear gradient and copy the generated CSS declaration.
AI and cloud costs
Estimate token volume, model API rates, GPU workloads, hosting, delivery, and archive retrieval.
AI Token Calculator
Estimate input, output, cached, daily, monthly, and annual token volume for LLM API workloads.
LLM API Cost Calculator
Estimate provider-independent LLM input, output, cached-input, monthly, and annual API costs with editable rates.
GPU Compute Cost Calculator
Estimate fleet hourly, per-run, daily, monthly, and annual GPU compute costs from editable rates.
Cloud Hosting Cost Calculator
Estimate provider-independent compute, storage, bandwidth, additional-service, monthly, and annual cloud costs.
CDN Cost Calculator
Estimate CDN bandwidth, request, cache-miss origin traffic, monthly, and annual delivery costs.
AWS S3 Glacier Retrieval Cost Calculator
Estimate S3 Glacier Flexible Retrieval and Deep Archive restore costs using current regional retrieval, request and temporary-storage rates.