DevToolbox

Universal document converter supporting Markdown, Word (Docx), PDF, HTML, LaTeX, EPUB, RTF, RST, MediaWiki, and hundreds more.

Optimize PDF images and fonts locally using the Ghostscript engine. Efficient batch processing with maximum privacy.

Edit PDF online, support adding text, images, signatures, watermarks, and free drawing

Extract text from images locally in your browser, supports 10+ languages including CJK, no upload needed

P2P file transfer using WebRTC, end-to-end encrypted

1-to-N file sharing via WebRTC, generate QR to let multiple clients download

Professional and simple online resume builder with PDF export

Convert Markdown to Word (.docx) with full support for math, tables, code blocks, and more

Compress and extract ZIP, GZIP archives online, entirely in your browser for privacy

Casio-style online scientific calculator supporting various math operations

Generate QR codes from text or URLs

Real-time counter for words, characters, lines, CJK characters, reading time

Quickly convert between CSV and JSON formats

Real-time Markdown preview with GFM support

Online LaTeX editor with real-time preview, text rendering, zoom, and PDF export

Online Mermaid diagram renderer with support for flowcharts, sequence diagrams, gantt charts and more, with various theme configurations and SVG/PNG export

Professional Graphviz (DOT) renderer supporting all syntax and multiple layout engines (dot, neato, circo, etc.), with template library and SVG/PNG export

Interactive ECharts playground with real-time JSON editing, various templates for line, bar, pie, radar charts, and professional color themes

Perfectly convert Markdown text to PDF documents with custom styles

Preview Excel (.xlsx, .xls) and CSV files online

Convert images to Base64 and vice versa

Efficient batch and bulk image compression tool. Adjust quality and dimensions locally in your browser for maximum privacy.

Convert between PNG, JPG, and WebP

Smart image background removal, quickly extract subjects from images

Smart background removal and color replacement for ID photos

Real-time SVG preview and basic code optimization

Pick HEX and RGB color values from uploaded images

All-in-one visual tool to merge, split, reorder, rotate or remove PDF pages with ease

Convert multiple images to a single PDF, with support for reordering and page settings

Calculate the future value of savings or investments with compound interest

Calculate monthly payments and total interest for loans

Mortgage calculator supporting commercial, provident fund, and combined loans with LPR support.

Online crop, resize, blur, and basic editing tool

Global timezone conversion and visual comparison

Professional online Favicon generator. Create favicons from text, emojis, or images and export all sizes instantly.

Online tool to create exam cheatsheets by automatically arranging text to maximize space, supports PDF export.

Professional online typing practice and speed test tool. Supports English/Chinese, multiple modes, and real-time accuracy statistics.

Real-time speech recognition powered by Whisper AI. Record from microphone and auto-generate meeting notes, summaries, and action items 100% locally.

Create mind maps online with dual outline/visual views, beautiful themes, and multiple export options.

Recognize text in PDF documents and export to TXT, supports multi-page processing and 10+ languages, runs locally

Full-featured Typst online editor with live preview, math, tables, graphics, and one-click PDF export