Free In-Browser Developer Tools & Utilities

Extract specific pages or split multi-page PDF documents locally in your browser with zero server uploads.

Combine multiple PDF documents into a single file locally in your browser with zero server uploads.

Rotate upside-down or sideways PDF pages by 90°, 180°, or 270° locally in your browser.

Convert JPG, PNG, and WebP photos or scans into a clean multi-page PDF document with zero uploads.

Stamp custom text or diagonal watermark overlays onto every page of a PDF document with zero uploads.

View, edit, or completely wipe author, producer, and title metadata from PDF files locally for total privacy.

Add page numbers, pagination headers, or footers to PDF documents locally in your browser with zero server uploads.

Convert every page of a PDF document into high-resolution PNG or JPG images locally in your browser.

Extract raw text, paragraphs, and formatted markdown from PDF files locally with zero server uploads.

Encrypt and lock sensitive PDF documents with custom passwords locally in your browser with zero uploads.

Draw or type your digital signature and stamp it onto any page of a PDF locally in your browser.

Interactive visual permission calculator for Linux/Unix file permissions with octal and symbolic modes.

Minify, compress, or beautify CSS styles and HTML markup client-side with real-time compression metrics.

Convert cURL requests into copy-pasteable JavaScript fetch, Node.js axios, and Python requests code.

Convert JSON payloads into clean TypeScript interfaces, types, and Zod validation schemas.

Convert between Unix timestamps (seconds & milliseconds), UTC dates, local timezones, and relative time.

Test, debug, and highlight regular expressions against sample text with live capture badges and cheatsheets.

Decode and inspect JWT header and payload claims securely in your browser with expiration validation.

Format, beautify, and capitalize SQL queries offline with clean clause indentation and minification.

Encode or decode text to Base64 format locally.

Strip hidden GPS coordinates, camera serial numbers, and device metadata from photos before sharing.

Generate cryptographically secure passwords or numeric PIN codes.

Generate SHA-256, SHA-384, and SHA-512 hashes instantly.

Extract URLs, strip tracking tags (UTM, fbclid, gclid), and copy clean links.

Deduplicate lines, toggle cases, and count words and characters without uploads.

Massive offline registry of Excel/Sheets formulas with a fill-in-the-blanks builder.

Format, validate, and minify JSON strings instantly.

Auto-saving local notes and true line-by-line diff comparison.

Write, preview, and convert GitHub-flavored Markdown into clean HTML with live dual-view rendering.

Convert CSV spreadsheets to JSON arrays or transform JSON objects back into CSV tables locally.

Convert Excel (.xlsx, .xls) spreadsheets to clean UTF-8 CSV locally in your browser with zero uploads.

Convert raw CSV and TSV files or pasted text into styled Microsoft Excel (.xlsx) workbooks locally.

Convert Excel (.xlsx, .xls) spreadsheets to clean JSON objects or arrays locally with zero uploads.

Convert JSON arrays or objects directly into formatted Microsoft Excel (.xlsx) workbooks locally.

Detect and purge duplicate rows in Excel and CSV files by specific columns or entire rows locally.

Convert Excel and CSV spreadsheets into clean GitHub-flavored Markdown tables locally.

Flip spreadsheet rows to columns and columns to rows in Excel and CSV files instantly in your browser.

Clean messy spreadsheets by removing blank rows, empty columns, and phantom whitespace in Excel & CSV files.

Convert colors between HEX, RGB, and HSL formats.

Compress PNG, JPEG, and WebP images locally inside your browser with zero server uploads.

Generate high-contrast QR codes for links, phone dialer numbers, or plain text.

Simulate how your meta tags, title, and description will look on Google Search and X (Twitter).

Clean and minify SVG markup, convert to CSS Data URIs, and export to React JSX components.

Convert PNG, JPG, or SVG images into copy-pasteable Base64 Data URIs, HTML tags, and CSS snippets.

Calculate days between dates or add/subtract days from a date.

Everyday percentage calculator for discounts, tips, and fractions.

A simple Pomodoro countdown timer for focused work sessions.

Pick a random name from a list or generate a random number.

Interactive world clock with 25,000+ searchable cities and synchronized hour slider.

Multi-category converter for data, length, mass, temperature, speed, volume, and time.

Generate bulk cryptographically secure UUID v4 identifiers locally with custom formatting and uppercase toggles.