⚙️ WasmTools

All tools

Every tool below is free and runs entirely in your browser — no signup, no upload.

Data

Format, validate, and transform structured text — all locally.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text, instantly in your browser.

WebAssemblyCLI / agent

Case Converter

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.

WebAssemblyCLI / agent

Color Converter

Convert colors between HEX, RGB, and HSL formats instantly.

WebAssemblyCLI / agent

CSS Formatter

Beautify (pretty-print) minified or messy CSS instantly, right in your browser.

runs locally

CSV to JSON Converter

Convert CSV data to a JSON array of objects, using the header row as keys.

WebAssemblyCLI / agent

Hash Generator

Calculate MD5, SHA-1, SHA-256, SHA-512, and CRC32 checksums of any text.

WebAssemblyCLI / agent

HTML Formatter

Beautify (pretty-print) minified or messy HTML instantly, right in your browser.

runs locally

HTML to Markdown Converter

Convert HTML pages and snippets to clean GitHub-Flavored Markdown instantly.

runs locally

JavaScript Formatter

Beautify (pretty-print) or minify JavaScript code instantly, right in your browser.

runs locally

JSON Formatter

Format, validate, minify, and escape JSON instantly. Powered by Rust + WebAssembly.

WebAssemblyCLI / agent

JWT Decoder

Decode a JSON Web Token and inspect its header, payload, and signature — without sending it anywhere.

WebAssemblyCLI / agent

Lorem Ipsum Generator

Generate placeholder lorem ipsum text by paragraphs, sentences, or words.

WebAssemblyCLI / agent

Markdown to HTML

Convert Markdown to clean HTML instantly, right in your browser.

WebAssemblyCLI / agent

Password Generator

Generate strong random passwords with letters, digits, and symbols.

WebAssemblyCLI / agent

Regex Tester

Test regular expressions against text and see every match with its position.

WebAssemblyCLI / agent

Line Sorter / Deduplicator

Sort lines alphabetically (A→Z or Z→A), remove duplicate lines, or reverse their order.

WebAssemblyCLI / agent

SQL Formatter

Beautify (pretty-print) SQL queries for MySQL, PostgreSQL, SQLite and more, right in your browser.

runs locally

Text Splitter / Joiner

Split text into lines by a delimiter, or join lines back together with a separator.

WebAssemblyCLI / agent

Unix Timestamp Converter

Convert Unix epoch timestamps to human-readable dates and back.

WebAssemblyCLI / agent

URL Encoder / Decoder

Percent-encode text for safe use in URLs, or decode it back.

WebAssemblyCLI / agent

UUID Generator

Generate random UUID v4 identifiers — one at a time or in bulk.

WebAssemblyCLI / agent

Word Counter

Count words, characters, sentences, paragraphs, and estimate reading time.

WebAssemblyCLI / agent

ZIP Compressor

Combine multiple files and folders into a single ZIP archive — entirely in your browser.

runs locally

ZIP Extractor

Extract the contents of a ZIP archive and download the files — entirely in your browser.

runs locally

Image

Compress, convert, and rasterize images without uploading them.

Barcode & QR Scanner

Read QR codes and barcodes (EAN, UPC, Code 128, and more) from image files — entirely in your browser.

runs locally

EXIF Metadata Viewer

View the hidden metadata in your photos — camera, date, and GPS location — entirely in your browser.

runs locally

HEIC to JPG Converter

Convert iPhone HEIC/HEIF photos to JPG or PNG — entirely in your browser.

runs locally

Image Compressor

Shrink JPEG, PNG, and WebP images with a quality slider — processed locally in a Web Worker.

runs locally

Image Format Converters

A collection of free image format converters: PNG, JPG, and WebP in every direction — all in your browser.

runs locally

Image Resizer

Resize images to exact dimensions with high-quality scaling — entirely in your browser.

runs locally

JPG to PNG Converter

Convert JPG images to lossless PNG online for free.

runs locally

JPG to WebP Converter

Convert JPG images to WebP online for free and save bandwidth.

runs locally

OCR — Image to Text

Extract text from images with OCR (printed & handwritten, 49 languages). Runs entirely in your browser — the image never leaves your device.

runs locally

PNG to JPG Converter

Convert PNG images to JPG online for free, with a quality slider.

runs locally

PNG to WebP Converter

Convert PNG images to WebP online for free, with adjustable quality.

runs locally

QR Code Generator

Generate QR codes for URLs, text, Wi-Fi, and more — download as PNG.

WebAssemblyCLI / agent

SVG to PNG

Rasterize SVG files to PNG with a custom output width, right in your browser.

WebAssemblyCLI / agent

WebP to JPG Converter

Convert WebP images to JPG online for free.

runs locally

WebP to PNG Converter

Convert WebP images to PNG online for free, preserving transparency.

runs locally

Audio

Record, convert, denoise, and transform audio — processed locally in your browser.

Audio Converter

Convert audio files to WAV or MP3 entirely in your browser.

runs locally

Audio Cutter

Trim an audio file to a start and end time.

runs locally

Audio Noise Reducer

Reduce background hiss and noise from recordings with a noise gate.

runs locally

Voice Recorder

Record audio from your microphone and download it as a WAV file.

runs locally

Audio Speed Changer

Speed up or slow down audio without changing its pitch.

runs locally

Audio Tools

A collection of free audio tools: record, convert, remove noise, change voice and speed, boost volume, and cut — all in your browser.

runs locally

Voice Changer

Change the pitch of a voice recording — chipmunk, deep voice, or any custom amount.

runs locally

Volume Booster

Increase (or lower) the volume of an audio file, with soft clipping to avoid distortion.

runs locally

Documents

Convert Word, PowerPoint, Excel, and other documents to Markdown — entirely in your browser.

DOC to Markdown

Convert legacy Word (.doc) documents to clean Markdown. Runs entirely in your browser.

runs locally

DOCX to Markdown

Convert Word (.docx) documents to clean Markdown. Preserves headings, lists, tables, and links. Runs entirely in your browser.

runs locally

EPUB to Markdown

Convert EPUB ebooks to Markdown, chapter by chapter. Runs entirely in your browser.

runs locally

ODP to Markdown

Convert OpenDocument presentations (.odp) to Markdown. Runs entirely in your browser.

runs locally

ODS to Markdown

Convert OpenDocument spreadsheets (.ods) to Markdown tables. Runs entirely in your browser.

runs locally

ODT to Markdown

Convert OpenDocument text files (.odt) to clean Markdown. Runs entirely in your browser.

runs locally

PPT to Markdown

Convert legacy PowerPoint (.ppt) presentations to Markdown. Runs entirely in your browser.

runs locally

PowerPoint to Markdown

Convert PowerPoint (.pptx) presentations to Markdown, slide by slide. Runs entirely in your browser.

runs locally

RTF to Markdown

Convert Rich Text Format (.rtf) files to clean Markdown. Runs entirely in your browser.

runs locally

Excel to Markdown

Convert Excel (.xlsx) spreadsheets to Markdown tables. Runs entirely in your browser.

runs locally

PDF

Merge, split, and convert PDF documents, 100% in your browser.

Merge PDF

Combine multiple PDF files into a single PDF, in the order you choose.

runs locally

PDF to Images

Render every PDF page to PNG or JPG, then download them individually.

runs locally

PDF to Text / Markdown

Extract text or structured Markdown from PDF files. Detects scanned/image-only PDFs. Runs entirely in your browser.

runs locally

Rotate PDF

Rotate all pages of a PDF by 90°, 180°, or 270°.

runs locally

Split PDF

Split a PDF into single-page PDF files, all in your browser.

runs locally

Watermark PDF

Stamp a diagonal text watermark on every page of a PDF.

runs locally

Video

Trim and transcode video entirely in your browser.

Video Cutter

Cut a segment out of a video without re-encoding (stream copy).

runs locally

Video to GIF Converter

Convert MP4, WebM, MOV and other video formats to an animated GIF.

runs locally

Video to MP4 Converter

Convert WebM, MOV, AVI and other formats to MP4 (H.264/AAC).

runs locally

Video to WebM Converter

Convert MP4, MOV and other formats to WebM (VP8/Vorbis).

runs locally

Video Tools

A collection of free video tools: cut, convert to MP4/WebM, and turn video into GIF — all in your browser.

runs locally

Slides

Turn presentation decks into images or PDF.

Slides to Images/PDF

Export reveal.js or plain-HTML slide decks to PNG images or a single PDF.

runs locally

AI

On-device AI helpers that run locally in your browser. Chrome only — availability depends on your device.

AI Chat (Local)

Chat with an AI model that runs on your device — pick Chrome's built-in Gemini Nano or a local WebAssembly model. No account, no cloud.

runs locally

AI Data Extractor

Extract structured data (names, dates, amounts) from text with AI that runs entirely on your device — Chrome's built-in model or a local WebAssembly model.

runs locally

AI Rewriter

Rewrite or improve text with AI that runs entirely on your device — Chrome's built-in model or a local WebAssembly model. No cloud.

runs locally

AI Summarizer

Summarize any text with AI that runs entirely on your device — Chrome's built-in model or a local WebAssembly model. No cloud.

runs locally

AI Translator

Translate text between 12 languages with AI that runs entirely on your device — Chrome's built-in model or a local WebAssembly model. No cloud.

runs locally