Your Efficient Online Toolbox

Record your screen, camera, and audio directly in your browser. Create high-quality WebM videos instantly. No installation required.

Professional free online teleprompter, no download required. Supports font adjustment, scroll speed control, mirror mode (horizontal/vertical), and Picture-in-Picture. Perfect for live streaming, recording, and speeches.

Securely compare text and code differences in your browser. Features side-by-side and inline views, syntax highlighting, and drag-and-drop support. No data is sent to servers.

Verify real files without uploading them.

Batch compress or extract .gz files, compare sizes and download results.

Select and merge multiple PDF files into one document instantly. Free, secure, and easy-to-use online PDF merger. No file upload limit for simple tasks.

Practice live beats with accents, subdivisions and swing; tap tempo and download WAV tracks.

Start, pause and record laps. Resume after reload and export your results.

Import CSV/TSV, filter, sort and edit cells, then download CSV or JSON.

Inspect local tracks, routes and waypoints with distance and elevation.

Inspect real requests, timings and response content locally

Measure single-note pitch and cents in real time

Test your mouse polling rate (Hz) instantly. Check the real-time report rate of your gaming mouse to ensure optimal performance and precision.

Rotate and clip local triangle meshes; inspect dimensions, area and edge closure

Real-time SVG code editor and viewer. Edit SVG paths, clear attributes, and convert SVG to PNG or JPG. Ideal for developers and designers to tweak vector graphics.

Simple and fast online whiteboard. Draw, sketch, and take notes directly in your browser. Supports stylus and touch input. Save your work as an image.

Alternate countdowns with Fischer increment, pause and saved match recovery.

Local reading, contents, search and bookmarks

Convert local files to Base64, URL-safe or Data URL, or restore encoded data as downloads.

Lay out CSV labels or repeated text at real dimensions

Mix continuous white, pink and brown noise with sleep fade and WAV export

Inspect local PCAP / PCAPNG packets and bytes

Arrange PDF pages for folded booklets

Drag a keep area and crop margins across PDF pages

Check your screen for dead pixels, stuck pixels, and color accuracy. Full-screen color cycling tool to inspect monitors, laptops, and mobile displays.

Create TAR/TAR.GZ locally, inspect archives, and export selected files.

Pack files locally, inspect ZIP contents and extract a selection.

Professional online audio editor. Cut, merge, and convert audio files (MP3, WAV) directly in your browser. Fast, secure, and easy to use with no installation required.

Send real requests and inspect bytes or live events

Reorder images, set paper and margins, and create a real multipage PDF.

Inspect live MIDI keyboard, controller and clock messages, filter and export logs.

Split each page, fixed page counts or custom groups into PDFs; download separately or as ZIP.

Render PDF pages locally as PNG/JPEG, set pages, DPI and rotation; download images or ZIP.

Trim, resize and reverse local videos into animated GIFs

Local high-fidelity playback · 6-band EQ

Browse hex bytes by page, search patterns, jump to offsets and download edited copies.

Check your camera image, resolution and mirrored view.

Split files by size and verify every part with a manifest before restoring the original.

Arrange real images in a grid, set spacing and file labels, and download one image.

Drag a selection or enter pixels, then crop, rotate, flip, and download.

Resize to a pixel box and preview proportional, padded, and center-cropped results.

Place handwriting and stamp images on actual PDF pages

Pack images into a PNG atlas; export coordinates as JSON and CSS preserving original spacing.

Analyze live microphone or local audio spectra

Download real barcodes and read codes from images or a camera

Powerful Cron expression generator and translator. Visualize Cron logic, generate standard Cron expressions, and see next execution times. Supports Linux and Quartz formats.

Password-protect a local file, download it encrypted, or restore its original content.

Test your gamepad, controller, joystick, or racing wheel online. Visualize buttons, axes, triggers, and vibration. Supports Xbox, PlayStation, and generic USB controllers.

Inspect local points, lines, polygons and properties

Select sensitive areas, cover with solid color, and download changed pixels.

Plan preparation, work, rest and cooldown, with repeated countdowns and sound cues.

Free online spin the wheel tool with bulk option import, custom probability weights, no-repeat draws, sound effects, local saving, and one-click URL sharing.

Ten-band EQ preview and local WAV export

Compare actual bytes, locate differing ranges, and export a report.

Validate HEX / SREC, inspect sparse memory and convert

Free batch image converter. Convert images to JPG, PNG, WEBP, AVIF, HEIC, and ICO formats instantly. Supports high-quality lossless conversion and resizing.

Calibrate chart axes, pick precise points and export data

Add watermark to your images locally in your browser. Support tiled text, logo watermark, and batch processing. No file upload required, ensuring 100% privacy.

Test your keyboard keys online. Check for ghosting, key rollover (NKRO), and functionality. Visualize key presses instantly to diagnose keyboard issues.

Fill actual PDF fields, preview pages and export the file

Connect a serial device, send and receive UTF-8 or Hex, download raw received bytes.

Use a split slider or overlay, count real pixel differences, and download a report.

Set a target size, compress a batch and preview the results.

Create unique and artistic QR codes online. Customize colors, shapes, and logos. Download in high-resolution PNG or SVG formats. Perfect for branding and marketing.

Open local databases, query and edit data, and download SQLite, CSV or JSON.

Explore frequency changes over time, seek in the recording and export image or data

Plot local line, scatter and bar charts, inspect rows and export

Local font typesetting, system comparison and PNG export

Load an image and CUBE preset, compare and export at original size.

Choose four corners to straighten photographed rectangles or documents and download the transformed image.

Check input levels and record a sample to hear your sound.

Edit SRT/WebVTT, sync against local media, shift or correct timings, and export.

Connect to a real service, send text or binary, inspect raw bytes and export logs.

Preview name templates and numbering, check conflicts, and download renamed files.

Test local browser functions, inspect APIs and permissions, and export a diagnostic report.

Choose a local folder, browse its hierarchy, filter files, and export path and size lists.

Pick colors from images with a real-time magnifier, extract dominant theme palettes automatically, and export swatches as CSS variables, JSON, or SVG color cards.

Inspect local 3D points by color or property

A minimalist, zen-mode typing speed test tool. Test your WPM and accuracy with no distractions. Features customizable themes, sound effects, and detailed statistics.

Preview routing, polarity and mid-side conversion; export WAV

Securely launch local apps and custom URI schemes from HTTP links. Supports clipboard copy before launch, protocol whitelisting, auto-jump with countdown, and shareable link generation. Perfect for OpenClaw and AI tool integration.

Record left-click intervals to inspect accidental double clicks and possible switch chatter.

Inspect GIF frames; download composited PNGs, a range ZIP and original timing JSON.

Create web and desktop app icons from one image; preview safe areas and download the pack.

Split images into 9-grid, 4-grid, or any custom layout for WeChat moments, Xiaohongshu and more. 100% local canvas processing, no upload needed. Download as ZIP or save individually.

Inspect scroll direction, raw deltas and fast direction changes, including horizontal scrolling.

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, and microseconds. Essential tool for developers and debuggers.

Inspect multiple contacts, movement trails, contact size and stylus pressure.

Measure LUFS, loudness range and sample peak of local recordings

Professional audio testing tool for headphones and speakers. Features stereo verification, frequency response sweep, bass test, phase check, and microphone visualization.

Full-screen distraction-free background tool. Generate solid colors, gradients, and dynamic effects for screen testing, relaxation, or ambient lighting.

Remove author, document properties, XMP and IDs; keep pages

Wait for the signal and measure mouse, touch or keyboard response.

Confirm identical content, choose copies to retain, and download unique files.

Browse local sheets, cells and formula caches

Read actual file headers, check formats and extensions, and download reports or byte-identical copies.

Make your screenshots pop with beautiful backgrounds, shadows, and window frames. Create professional-looking images for social media and presentations instantly.

Capture real video images and contact sheets

Find active regions, preview and export WAV

Remove photo details, keep encoded image data

Remove common MP4 / MOV tags while keeping media bytes