App tools
118 free app tools — instant, in-browser, no signup.
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Markdown Editor
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Markdown to PDF
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JSON Formatter & Validator
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QR Code Generator
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CSV to JSON Converter
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JSON to CSV Converter
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YAML to JSON Converter
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JSON to YAML Converter
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Image Resizer & Converter
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Merge PDF Files
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CSV Column Extractor
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CSV Row Filter
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CSV Sorter
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CSV Duplicate Row Remover
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CSV Statistics Summary
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CSV Transpose
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CSV to SQL INSERT Generator
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JSON to SQL INSERT Generator
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JSON Flattener
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JSON Minify / Beautify
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CSV Splitter (by Rows)
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JSON to TypeScript Interface
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File Hash Generator
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HMAC Generator
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Base64 File Encoder
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URL Encoder / Decoder
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HTML Entity Encoder / Decoder
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JSON Diff Viewer
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Regex Tester
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Cron Expression Explainer
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Bulk UUID Generator
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JSON to XML Converter
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XML to JSON Converter
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Query String Parser
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JSONPath Finder
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Text Diff Checker
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Backslash Escape / Unescape
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Text to PDF Converter
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CSV Data to PDF Table
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Invoice Generator
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vCard Generator
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ICS Calendar Event Generator
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Resume PDF Builder
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Certificate Generator
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Label Sheet Generator
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Business Card PDF Maker
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Markdown to HTML Converter
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Image Compressor
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Image to WebP Converter
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Image to JPEG Converter
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PNG to JPG Converter
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Image Cropper
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Image Rotate & Flip
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Image to Base64 Encoder
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Base64 to Image Decoder
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Image Grayscale Converter
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Image Color Inverter
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Image Pixelator
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Image Color Picker
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Favicon Generator
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Image Border Adder
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Image Brightness & Contrast
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Image Circle Crop
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Online Tone Generator
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Online Metronome
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Voice & Audio Recorder
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Screen Recorder
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Webcam Photo Booth
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Live Audio Visualizer
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Color Palette from Image
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Image to ASCII Art Converter
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White Noise Generator
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Binaural Beat Generator
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Pitch Detector & Instrument Tuner
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Webcam Mirror
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PDF Page Range Extractor
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PDF Page Rotator
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Delete PDF Pages
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Reorder PDF Pages
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PDF Text Extractor
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Add Page Numbers to PDF
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PDF Metadata Editor
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Images to PDF Converter
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CSV Viewer & Sorter
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CSV to Markdown Table
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TSV to CSV Converter
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JSON Tree Viewer
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NDJSON to JSON Converter
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SVG Blob Generator
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SVG Wave Generator
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CSS Gradient Generator
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CSS Box-Shadow Generator
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CSS Clip-Path Maker
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Mesh Gradient Generator
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SVG to PNG Converter
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Barcode Generator
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Placeholder Image Generator
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CSS Border-Radius Generator
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SVG Pattern Generator
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Color Shades Generator
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Markdown Table Generator
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Find and Replace with Regex
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Case Converter Studio
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Lorem Ipsum Generator
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Word Frequency Counter
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Text to Speech
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Online Notepad
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Pomodoro Timer
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Text Encrypter / Decrypter
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Password Generator Pro
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Remove Line Breaks Pro
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Sort and Deduplicate Lines
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Character Map
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Cron Builder with Next-Run Preview
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Regex Railroad Diagram Visualizer
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Password Crack Time Estimator
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WCAG Palette Auditor
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Aspect Ratio & Safe-Zone Template