Free Developer & AI Tools Online
Privacy-first utilities that run entirely in your browser — no signup, no uploads, no data leaving your device.
JSON Prettier
Format, validate and prettify JSON.
JSON Validator
Validate JSON syntax and inspect structure.
JSON Diff
Compare two JSON documents semantically.
JSON Viewer
Explore JSON as a collapsible tree.
JSON to YAML
Convert JSON to clean YAML instantly.
YAML to JSON
Convert YAML to formatted JSON instantly.
JSON to CSV
Convert JSON arrays to CSV or TSV.
CSV to JSON
Convert CSV or TSV to a JSON array.
JSON to TypeScript
Generate TypeScript types from JSON.
UUID Generator
Generate random UUIDs (v4, v1) with formatting & validation.
Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-384 & SHA-512 hashes.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 to plain text.
Cron Expression Generator
Build, parse & visualize cron schedules with next run times.
cURL to Fetch
Convert cURL commands to JavaScript fetch() API calls.
cURL to Axios
Convert cURL commands to Axios JavaScript/TypeScript code.
.env Parser
Parse, validate & export .env files to JSON, YAML, TOML.
JWT Decoder
Decode, verify and analyze JWT tokens.
Regex Tester
Test, validate and debug regular expressions.
URL Parser
Parse a URL and extract its components.
SQL Formatter
Format and beautify SQL queries.
Text Diff Viewer
Compare text and highlight differences.
QR Generator
Generate QR codes for links and text.
XML/HTML Prettifier
Format and beautify XML or HTML code.
SVG to JSX
Convert SVG markup into React JSX components.
Time Converter
Convert time between different formats.
JS Editor
Write, run and debug JavaScript online.
Prompt Builder
Compose and structure reusable AI prompts.
Token Counter
Estimate token usage for LLM prompts.
Prompt Optimizer
Refine prompts for clearer model output.
System Prompt Generator
Generate strong system prompts from a goal.
AI JSON Schema
Build JSON schemas for structured outputs.
Embedding Inspector
Inspect and compare embedding vectors.
Model Comparator
Compare model capabilities side by side.
PDF Merger
Combine multiple PDF files into one document.
PDF Splitter
Split a PDF into separate files by page or range.
PDF Compressor
Reduce PDF file size with adjustable compression.
PDF to Text
Extract selectable text from PDF documents.
PDF Page Extractor
Extract specific pages from a PDF into a new file.
PDF Rotate
Rotate PDF pages clockwise or counter-clockwise.
PDF Unlock
Remove password protection from PDF files.
PDF Protect
Add password protection and restrictions to PDFs.
Image Compressor
Reduce image file size with adjustable quality.
Crop Image
Crop images with visual selection and aspect presets.
PNG to JPG
Convert PNG images to JPG with adjustable quality.
JPG to PNG
Convert JPG images to lossless PNG format.
WebP Converter
Convert images to and from WebP format.
SVG Optimizer
Optimize SVG files by removing bloat and metadata.
Age Calculator
Calculate exact age in years, months & days with extras.
Percentage Calculator
Calculate percent of, what percent, change, increase & decrease.
GST Calculator
Add or extract GST with CGST & SGST breakdown.
EMI Calculator
Calculate monthly EMI, total interest & amortization schedule.
Salary Calculator
Convert salary across periods with custom deductions.
BMI Calculator
Calculate Body Mass Index with category classification.
Discount Calculator
Calculate final price after single or stacked discounts.