All-in-one browser tools
A growing collection of tools that run entirely on your device — nothing is uploaded to a server.
Video
8Batch Converter (all formats)
Convert and compress video, audio and images in batches with fine-grained settings.
Video Converter
Convert video to MP4, WebM, MKV, AVI and more.
Compress Video
Reduce video file size while keeping good quality.
Video to GIF
Turn a video clip into a GIF animation.
Trim video
Cut video clips online without quality loss or server uploads.
Photo → Video with music
A photo plus music becomes a video for Clips, Reels and Shorts — with a live preview.
Screen Recorder
Record your screen, a window or a browser tab. No limits, no watermarks, no server uploads.
Download YouTube Thumbnail
The video cover in every available size, up to HD — just paste a link.
Audio
5Extract Audio from Video
Save only the sound track from a video as MP3 and more.
Audio Converter
Convert audio to MP3, WAV, FLAC, OGG and more.
Compress Audio
Reduce the size of music, podcasts and voice recordings.
Trim MP3 & audio
Cut songs or audio recordings for ringtones without quality loss.
Audio & video to text & summary
Transcribe speech, remove filler words, and extract key bullet points.
Images
6Image Converter
Convert images to WebP, JPEG, PNG and more.
Compress Image
Reduce photo file size without visible quality loss.
Crop image
Interactive photo cropping with handles and ratio presets (1:1, 16:9, Stories) right in your browser.
Photo for documents
Crop a photo to document sizes (3x4, 35x45 mm, US passport) and compress it under a KB limit.
Remove EXIF from photo
View and remove photo metadata — GPS location, camera model, date.
Watermark photos
Add a text or logo watermark to several photos at once.
Merge PDF
Combine several PDFs into one in the order you want.
Split PDF
Pick pages and extract them into separate PDF files.
Compress PDF
Reduce file size while keeping it readable.
PDF → Images
Export pages as PNG, JPEG or WebP.
Photos → PDF
Build a PDF from photos and pictures in the order you want.
Insert Image
Add a picture to the start, middle or end of a PDF.
Math for study
10Matrix Calculator (step by step)
Determinant, inverse, rank, multiplication and linear systems — with the full solution chain, like on paper.
Equation Solver (with steps)
Linear and quadratic equations, systems of equations — with discriminant and detailed explanation.
Function Grapher
Type y = x² or sin(x) — the graph appears instantly. Zoom, pan, several functions at once.
3D Function Grapher
Surface z = f(x, y): type a formula and spin it with your mouse. Height coloring, zoom, all in the browser.
Derivatives
The derivative of a function with a detailed step-by-step breakdown, a graph with extrema and the three meanings of the derivative.
Antiderivative and indefinite integral
The indefinite integral (antiderivative) broken down step by step: table, substitution, by parts. Graph and table.
Definite integral
The definite integral as the area under the graph: shaded area, Newton–Leibniz formula, explanation.
Fraction Calculator (with steps)
Add, subtract, multiply and divide fractions — common denominator and reduction explained. Plus GCD and LCM.
Trigonometry
Tables of values, identities, reduction formulas and equations solved step by step.
Percentage Calculator
All typical percent problems — with the formula and an explanation of every calculation.
Code
1Utilities
2QR Code Generator
Create a QR code for a link, text, or Wi-Fi: choose colors, size, logo, and download in PNG or SVG.
Transfer files between devices
Move a file from phone to computer and back directly: pair the devices with a QR code, nothing is uploaded to a server. Most reliable on the same Wi-Fi.
Optics and Imaging
1Nothing found