Free tools from Matrix OS
Small tasks, done fast.
Format data, work with local files, check a page, or prepare an agent config. These tools run in your browser. No account, card, or cloud computer needed.
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104 of 104 browser tools
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Merge PDFs
Combine several PDF files in your browser and download one document with pages in the order you selected.
Image
Image Compressor
Export a JPEG or WebP copy at a chosen quality and compare its file size before sharing.
Developer
JSON Formatter
Format compact JSON with indentation and clear parse feedback, directly in your browser.
Collaboration
Peer Video Call
Start a direct browser video call with another person using WebRTC and copy-and-paste connection codes.
21 tools
PDF Workspace
Arrange and rotate pages from local PDFs using thumbnails, then download one combined document without uploading files.
PDF to Narrated Audio
Turn the selectable text in a PDF into spoken audio in your browser, then download a WAV file.
Check PDF Signature
Check the integrity of supported embedded PDF signatures locally in your browser.
Merge PDFs
Combine several PDF files in your browser and download one document with pages in the order you selected.
Split PDF
Extract selected pages from a PDF into a new file without sending the original to a server.
Rotate PDF
Turn every page of a PDF by 90, 180, or 270 degrees and save the corrected document locally.
Watermark PDF
Add visible text across each PDF page in the browser and download the marked document.
Add PDF Page Numbers
Stamp a page number on every page of a PDF and download the numbered copy from your browser.
Edit PDF Metadata
Set a PDF title or author locally before sharing the document.
Add Text to PDF
Draw short visible text on the first PDF page in your browser and download the updated file.
Sign PDF Visually
Place your typed name as a visible signature on the first page of a PDF without uploading the file.
Protect PDF with Password
Encrypt a PDF with an AES-256 open password directly in your browser before sharing it.
Unlock PDF
Remove password encryption from a PDF you can open, entirely within your browser.
Compress PDF Losslessly
Repack PDF streams and objects locally to reduce file size when the document allows it.
Inspect PDF Structure
Check that a PDF opens structurally and view its page count, version, and encryption status.
Compare PDF Text
Compare the extracted text of two PDFs page by page in your browser to spot wording changes.
PDF to Word Text
Extract text from a PDF into an editable Word document without uploading the original file.
PDF to Excel Text
Extract PDF text lines into an Excel workbook with page and line references, locally in your browser.
PDF to Images
Render each page of a local PDF as a PNG image and download the pages in one ZIP archive.
Redact PDF Areas
Draw multiple blacked-out areas across PDF pages, then rasterize every page to remove the original text layer.
PDF OCR to Text
Recognize English text in scanned PDF pages locally after downloading an OCR model to your browser.
Image
13 tools
Image
Image Workspace
Convert, compress, resize, or turn local images into a PDF in one browser workspace.
Image
Image Converter
Convert a local PNG, JPEG, or WebP image into another browser-supported image format.
Image
Image Compressor
Export a JPEG or WebP copy at a chosen quality and compare its file size before sharing.
Image
Image Resizer
Set a maximum width and height, preserve proportions, and export a resized local image.
Image
Image Color Picker
Click a pixel in a local image to read its HEX and RGBA color values without uploading it.
Image
Image Metadata Viewer
Inspect image size, dimensions, format, and selected JPEG camera metadata locally.
Image
Images to PDF
Put up to ten local images on separate PDF pages in selected-file list order and download the result.
Image
Image OCR
Extract English text from a local image using a model downloaded to your browser.
Image
Image Upscaler
Enlarge an image with smooth interpolation or local AI detail enhancement in your browser.
Image
Blur Faces in an Image
Detect and pixelate faces in a local photo without uploading it.
Image
Portrait Background Remover
Remove the background from a human portrait in your browser and download a transparent PNG.
Image
Image Tag Suggestions
Compare a local image against your own candidate labels with a small browser model.
Image
Image Caption Generator
Draft a short caption for a local photo with a model running in your browser.
Audio
8 tools
Audio
Audio Workspace
Edit up to five audio files in private browser tabs, with waveform previews, independent trim and effects settings, and local session recovery.
Audio
Audio Converter
Convert a short local audio file to WAV or a browser-supported compressed audio format.
Audio
Audio Trimmer
Cut a selected time range from a local audio file and export the trimmed result.
Audio
Transcription Player
Play a short recording while writing timestamped notes and export them as subtitle cues.
Audio
Speech to Text
Transcribe a short English recording with a model running in your browser.
Audio
Audio Compressor
Export a short local audio clip as a smaller Opus copy at a selected target bitrate.
Audio
Audio Noise Reducer
Reduce a steady background noise floor from a short local recording using browser audio processing.
Audio
Audio Pitch and Speed
Adjust a short clip's pitch and playback speed separately, then export the processed audio locally.
Developer
22 tools
Developer
JSON Formatter
Format compact JSON with indentation and clear parse feedback, directly in your browser.
Developer
JSON Validator
Check whether a JSON document parses and see the shape of its root value without uploading it.
Developer
JSON Minifier
Remove formatting whitespace from valid JSON while keeping its parsed values intact.
Developer
JSON to CSV
Turn a small array of flat JSON objects into a downloadable CSV table in your browser.
Developer
CSV to JSON
Convert a CSV table with a header row into structured JSON without sending rows to a server.
Developer
Base64 Encoder
Encode UTF-8 text as Base64 locally for API tests and development workflows.
Developer
Base64 Decoder
Decode Base64 into readable UTF-8 text in the browser, with invalid-data feedback.
Developer
URL Encoder
Percent-encode a URL parameter value so special characters can travel safely in a query string.
Developer
URL Decoder
Decode percent-encoded URL text and spot malformed escape sequences before using them.
Developer
HTML Encoder
Escape markup characters so text can be inserted into HTML source as text rather than code.
Developer
HTML Decoder
Turn common named and numeric HTML entities back into readable text locally.
Developer
SHA-256 Hash Generator
Calculate a SHA-256 digest of UTF-8 text as hex, Base64, or SRI with the browser's native crypto API.
Developer
UUID Generator
Generate a random UUID v4 in the browser using the device's cryptographic random source.
Developer
Regex Tester
Test a JavaScript regular expression against sample text and inspect bounded matches.
Developer
Text Diff Checker
Compare two small blocks of text line by line and see additions and removals.
Developer
Timestamp Converter
Convert a Unix timestamp or date string into UTC and local browser time.
Developer
Color Converter & Contrast Checker
Convert a hex color to RGB and HSL and check WCAG text contrast against white and black.
Developer
JWT Decoder and Verifier
Decode JWT claims and optionally verify a supported signature using browser cryptography.
Developer
QR Code Generator
Turn text or a URL into a downloadable QR code image without sending the content to a server.
Developer
Password Generator
Create a random password locally with your chosen length and character sets using secure browser randomness.
Developer
Password Strength Checker
Estimate how guessable a password is in your browser without sending the secret to Matrix.
Developer
JavaScript and TypeScript Workspace
Run short JavaScript or TypeScript snippets in a timed, isolated browser sandbox and inspect console output.
Writing
20 tools
Writing
Word Counter
Count words, characters, sentences, and estimated reading time for a draft.
Writing
Character Counter
Measure characters, characters without spaces, lines, and UTF-8 bytes in your text.
Writing
Readability Checker
Estimate reading ease, sentence length, and long-word frequency for English prose.
Writing
Case Converter
Change text to upper, lower, title, or sentence case with one clear command.
Writing
URL Slug Generator
Create a lowercase, hyphenated URL slug from a page title or topic.
Writing
Text Cleaner
Trim stray spaces and collapse repeated blank lines in copied notes or drafts.
Writing
Line Sorter
Sort a list of lines alphabetically without sending its contents to a service.
Writing
Duplicate Line Remover
Keep the first occurrence of each line while preserving the original order.
Writing
Find and Replace
Replace literal text across a draft without uploading or changing the source file.
Writing
Markdown to HTML
Convert a small Markdown draft into escaped HTML for inspection and reuse.
Writing
HTML to Text
Extract readable text from pasted HTML while discarding tags, scripts, and styles.
Writing
Lorem Ipsum Generator
Generate a few placeholder paragraphs for testing a layout before real copy exists.
Writing
Keyword Frequency Checker
See the most frequent words in a draft as a diagnostic, without prescribing keyword quotas.
Writing
Text to Speech
Read text aloud with a local voice exposed by your browser or device without needing a Matrix computer.
Writing
Text Workspace
Edit a draft, count words and characters, and apply common text transforms entirely in your browser.
Writing
Markdown Editor
Write Markdown with a live sanitized preview and download the source or safe HTML locally.
Writing
CSV Editor
Open a CSV table, edit cells in your browser, and download a spreadsheet-safe CSV copy.
Writing
CSV to PDF
Turn a small CSV table into a downloadable PDF with rows and column groups laid out on pages.
Writing
Local Text Summarizer
Summarize a short English passage with a model that runs in your browser after its first download.
Writing
Local Sentiment Analysis
Classify the positive or negative tone of short English text with a model running in your browser.
SEO
11 tools
SEO
Meta Tag Generator
Generate title, description, canonical, and social metadata for a page from a small input.
SEO
Robots.txt Generator
Create a small permissive robots.txt file with an optional sitemap address.
SEO
XML Sitemap Generator
Build a valid XML sitemap from a bounded list of absolute page URLs.
SEO
Canonical URL Cleaner
Remove tracking parameters and fragments from a URL to review a possible canonical address.
SEO
Hreflang Tag Generator
Create alternate-language link tags from locale and URL pairs for a multilingual page.
SEO
UTM Campaign URL Builder
Add source, medium, and campaign parameters to a link for campaign attribution.
SEO
Title Length Checker
Review a page title's character length and plain-text wording before publishing.
SEO
Meta Description Checker
Review description length and wording without treating a character target as a ranking rule.
SEO
Social Card Tag Generator
Draft Open Graph and X card metadata for a link, including a selected image URL.
SEO
JSON-LD Generator
Draft basic Organization or SoftwareApplication structured data for review.
SEO
Pasted HTML SEO Audit
Inspect pasted HTML for title, description, headings, canonical, and index directives locally.
Agents
5 tools
Agents
AGENTS.md Structure Checker
Review an AGENTS.md file for readable sections, scope cues, and oversized instructions.
Agents
MCP Configuration Validator
Check a common mcpServers JSON shape for missing commands, URLs, and malformed argument lists.
Agents
Local AI Chat
Chat with a small AI model that runs in your browser after its first download.
Agents
Prompt Token Estimator
Get a rough token and context-size estimate for a prompt without transmitting its content.
Agents
Cron Expression Explainer
Explain a standard five-field cron expression and preview its next five UTC runs.
Collaboration
4 tools
Collaboration
Peer Video Call
Start a direct browser video call with another person using WebRTC and copy-and-paste connection codes.
Collaboration
Peer File Share
Send a file of up to 20 MB directly to another browser over an encrypted WebRTC data channel.
Collaboration
Shared Whiteboard
Draw with a peer on a live browser whiteboard over a direct WebRTC data channel.
Collaboration
Browser Text Workflows
Chain up to ten working Matrix text tools in a reusable workflow that runs only in your browser tab.
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