Perform everyday calculations and basic scientific functions directly in your browser with keyboard support and no data uploads.
Capture photos from your browser using the webcam and download PNG snapshots without uploading any images.
Create APA/MLA/Chicago/IEEE/GB/T 7714 citation strings in your browser and copy them into papers and reports.
Evaluate whether your foreground/background colors meet WCAG AA/AAA contrast requirements and preview accessibility impact.
Convert a color value into HEX/RGB/HSL formats in your browser and copy the results for design or code.
Generate a color palette from an image with HEX values and CSS-ready variables, processed entirely on the client.
Pick precise colors from an image, inspect HEX/RGB/HSL values and copy them without uploading the picture.
View heading degrees from your device sensors in the browser with optional true north estimation for simple navigation checks.
Paste a baseline contract and several versions to see highlighted differences and copy a unified-style diff for review.
Encrypt or decrypt files locally with AES-256-GCM and download either the JSON payload or the restored file, all in the browser.
Compress GIFs by tuning size, frame rate and colors with ffmpeg.wasm in your browser, with all processing done locally and no file uploads.
Convert GIF animations to MP4 or WebM in your browser with ffmpeg.wasm, tuning size and FPS with all work done locally and no file uploads.
Convert Go map fmt output to readable JSON and back again directly in your browser so you can paste data into Go code or documentation without sending anything over the network.
Compress or decompress text and files using Gzip or Deflate directly in your browser, viewing Base64 output or downloading binary results without uploading any content to a server.
Convert a single image into a macOS ICNS icon file with multiple sizes, processed locally in your browser.
Generate Windows-compatible ICO icon files from a single image, with all processing done locally in your browser.
Convert icon font files to Base64 Data URLs and generate @font-face CSS locally in your browser for font inlining and quick debugging.
Choose preset or custom ID sizes, set background and fine-tune zoom/position, then export PNG/JPG locally in your browser with no uploads.
Compress common image formats with adjustable quality and instant size comparison, all processed locally in your browser.
Convert images between popular formats such as JPG, PNG, WebP, BMP, ICO and GIF directly in your browser with no uploads.
Crop images with zoom, pan and multiple regions, exporting lossless PNGs locally with no uploads.
Resize images to an exact pixel size using contain or stretch modes, exporting a PNG locally in your browser with zero uploads.
Merge multiple images into a single PDF with page size, DPI, margin and background color control, all generated locally in your browser with zero uploads.
Drop an audio or video file to inspect container, codecs, duration, bitrate and stream details in your browser, copy the parsed JSON and keep everything local with no uploads.
Convert Markdown into Word-ready content as rich HTML or plain Markdown and copy it directly into your document, with all processing done locally for privacy.
Markdown editor with live preview and local draft saving that lets you copy Markdown or export HTML without uploading any content.
Create a playlist from local audio files and play them in your browser with speed, volume and loop controls, keeping every track fully local with no uploads.
Measure environmental noise levels in your browser using the microphone, with live dB readings and basic calibration while keeping all audio local and private.
WebRTC-based P2P file transfer between browsers, with no relay server and all file data kept local to your devices.
Enter a base HEX color to generate multiple harmonious palettes locally and copy them into your design workflow with one click.
Rewrite and optimize PDF structure locally to try reducing file size.
Encrypt PDFs to JSON and decrypt them back locally using AES-256-GCM.
Extract selected PDF pages to a new PDF or per-page ZIP locally.
Merge and reorder multiple PDFs locally with per-file page ranges.
Rotate all or selected PDF pages by 90/180/270 degrees locally.
Split or extract PDF pages locally in your browser with no uploads.
Stamp or watermark PDFs locally in your browser with no uploads.
Convert PDF pages to PNG/JPG images and download as a ZIP with adjustable page range and render scale, processed fully in the browser.
Measure on-screen distances in pixels with optional calibration to cm/mm/in using fully local processing in your browser with no uploads.
Annotate screenshots with pen, rectangles, arrows and text, then export PNG locally in your browser with no uploads.
Extract red seals from scanned documents into a transparent PNG stamp, with local-only processing and adjustable detection parameters.
Analyze red seals in scans and screenshots with pixel-based metrics to produce a suspicion score and mask preview, running entirely in the browser for privacy.
Draw a handwritten signature and export a transparent PNG with adjustable stroke settings and auto-trim, running entirely in the browser for privacy.
Extract text from PDFs locally and export as TXT or ZIP, with no uploads.
Generate TOC pages for your PDF from a “page number + title” list and insert them locally without uploads.
Remove pages from a PDF locally in your browser and download a slimmer copy without uploads.
Convert PEM/DER/JWK/JWKS locally, export JWK/JWKS and PEM/DER, and inspect key details.
Repack PPTX locally to try reducing size without changing slides or uploading files.
Drag two rays to measure angles on screen, with both primary and reflex angles shown, all computed locally.
Convert Unix timestamps to date/time and back in local time or UTC, with one-click copy for seconds and milliseconds and fully local processing in your browser.
Browser-based speech-to-text tool powered by the Web Speech API, with language selection and real-time interim/final transcripts processed locally for privacy.
Merge multiple images into a sprite sheet PNG with configurable width and padding, and export JSON coordinates plus ready-to-use CSS for frontend asset optimization.
Format SQL queries with smart line breaks and indentation, optional uppercase keywords, and fully local processing with no uploads.
Check a site’s HTTP and HTTPS reachability, status codes and redirects via a public proxy to quickly spot HTTPS configuration issues and redirect problems.
Convert subtitle formats and fix timelines entirely in your browser, with UTF-8/GBK encoding support and no file uploads.
Convert SVG graphics to PNG or JPG locally with custom size and background, without uploading any files.
Optimize SVGs locally by removing comments and metadata and compressing whitespace to shrink file size.
Convert text to spoken audio locally in your browser with adjustable voice, rate and pitch, without uploading any data.
Online timer with countdown and stopwatch modes plus quick presets, running entirely in your browser without sending any data.
Convert between IANA time zones and see UTC plus Unix timestamps entirely in your browser with no data uploads.