Privacy-First Browser Tools

Professional-grade utilities for quick browser workflows. Many tools process inputs locally; check each page for its verified boundary.

Browser-BasedTool-Specific BoundaryNo Login Required26+ Tools
Privacy-Focused
Document

PDF Compressor

Compress PDF files locally

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  • •Compress PDF files locally
  • •No upload required - 100% privacy
  • •Multiple compression levels
pdf-libWebAssembly
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Privacy-Focused
Data

JSON ⇄ CSV Converter

Convert JSON to CSV and vice versa

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  • •Convert JSON to CSV and vice versa
  • •Field mapping and sorting
  • •Handle large files with Web Workers
PapaParseSheetJSWeb Workers
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Privacy-Focused
Media

Video Extract Audio

Extract audio from video files

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  • •Extract audio from video files
  • •Generate video thumbnails
  • •WebCodecs API for fast processing
WebCodecsffmpeg.wasmCanvas API
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Privacy-Focused
Developer

Token Counter & Prompt Size Estimator

Estimate prompt token counts

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  • •Estimate prompt token counts
  • •Check rough context usage
  • •Compare context window fit
js-tiktokenReactVite
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Privacy-Focused
Developer

OpenAPI Client Generator

Generate TypeScript, JavaScript, and Python clients from OpenAPI specs

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  • •Generate TypeScript, JavaScript, and Python clients from OpenAPI specs
  • •Use OpenAPI or Swagger JSON specs
  • •Preview endpoints before copying generated code
ReactTypeScriptOpenAPI
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Privacy-Focused
Image

Image Compressor

Compress PNG, JPG, WebP images

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  • •Compress PNG, JPG, WebP images
  • •Remove EXIF metadata
  • •Batch processing support
browser-image-compressionWebAssembly
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Privacy-Focused
Developer

Regex Playground

Test and debug regular expressions

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  • •Test and debug regular expressions
  • •Support multiple language flavors
  • •Highlight matches and groups
Pure JavaScript
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Privacy-Focused
Developer

UUID & Hash Generator

Generate UUID (v4)

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  • •Generate UUID (v4)
  • •Create MD5, SHA-1, SHA-256 hashes
  • •Batch generation support
Web Crypto API
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Privacy-Focused
Developer

Diff & Merge Viewer

Compare text or JSON files

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  • •Compare text or JSON files
  • •Line-by-line and character-level diff
  • •Support merge operations
diff-match-patchreact-diff-viewer
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Privacy-Focused
Document

Markdown Table Generator

Convert CSV/Excel to Markdown tables

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  • •Convert CSV/Excel to Markdown tables
  • •Visual table editor
  • •Alignment control
markdown-tableSheetJS
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Privacy-Focused
Image

Barcode & QR Code Generator

Generate QR codes and barcodes

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  • •Generate QR codes and barcodes
  • •Multiple barcode formats
  • •Batch generation
qrcode-generatorzxing-js
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Privacy-Focused
Document

PDF Merge

Merge multiple PDF files

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  • •Merge multiple PDF files
  • •Reorder pages before merging
  • •Local processing - no upload
pdf-libWebAssembly
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Privacy-Focused
Document

PDF OCR

Extract text from scanned PDFs

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  • •Extract text from scanned PDFs
  • •Support multiple languages
  • •Tesseract.js WASM engine
tesseract.jspdf-libWebAssembly
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Image

PDF Sign & Stamp

Add digital signatures to PDFs

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  • •Add digital signatures to PDFs
  • •Insert stamps and watermarks
  • •Custom signature drawing
pdf-libsignature-padCanvas API
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Privacy-Focused
Data

PDF to Images

Convert PDF pages to images

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  • •Convert PDF pages to images
  • •Support PNG, JPG formats
  • •Adjustable image quality
pdf.jsCanvas API
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Privacy-Focused
Media

Audio Trim & Merge

Trim audio files precisely

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  • •Trim audio files precisely
  • •Merge multiple audio tracks
  • •Visual waveform editor
wavesurfer.jsffmpeg.wasmWeb Audio API
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Privacy-Focused
Media

Audio to Text

Transcribe audio to text

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  • •Transcribe audio to text
  • •Support multiple languages
  • •Web Speech API integration
Web Speech APIWhisper.jsWebAssembly
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Privacy-Focused
Media

Video Convert/Compress

Convert video formats

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  • •Convert video formats
  • •Compress video files
  • •Adjust resolution and bitrate
ffmpeg.wasmWebCodecsWebAssembly
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Privacy-Focused
Media

Subtitle Editor

Edit SRT, VTT subtitle files

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  • •Edit SRT, VTT subtitle files
  • •Sync subtitles with video
  • •Timeline-based editing
subsrtvideo.jsPure JavaScript
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Image

Image Resize

Resize images to custom dimensions

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  • •Resize images to custom dimensions
  • •Maintain aspect ratio
  • •Batch resize support
picaCanvas APIWebAssembly
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Privacy-Focused
Image

Image Redact/Privacy

Redact sensitive information

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  • •Redact sensitive information
  • •Blur or pixelate areas
  • •Remove EXIF metadata
fabric.jsexif-jsCanvas API
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Privacy-Focused
Image

QR Code Decoder

Scan QR codes from images

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  • •Scan QR codes from images
  • •Camera-based scanning
  • •Batch QR code decoding
zxing-jsjsQRWeb Camera API
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Privacy-Focused
Data

SQL on CSV

Run SQL queries on CSV files

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  • •Run SQL queries on CSV files
  • •Support JOIN operations
  • •In-browser SQLite database
sql.jsPapaParseWebAssembly
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Privacy-Focused
Data

CSV Join/Deduplicate

Join multiple CSV files

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  • •Join multiple CSV files
  • •Remove duplicate rows
  • •Column-based merging
PapaParselodashWeb Workers
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Privacy-Focused
Developer

Cron Expression Helper

Generate cron expressions

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  • •Generate cron expressions
  • •Visual schedule builder
  • •Explain existing cron syntax
cronstruecron-parserPure JavaScript
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Privacy-Focused
Developer

SQL Formatter/Sanitizer

Format SQL queries

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  • •Format SQL queries
  • •Syntax highlighting
  • •Remove sensitive data
sql-formatterPrism.jsPure JavaScript
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