All-in-one browser tools
A growing collection of tools that run entirely on your device — nothing is uploaded to a server.
Media
10Batch 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.
Extract 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.
Image Converter
Convert images to WebP, JPEG, PNG and more.
Compress Image
Reduce photo file size without visible quality loss.
Download YouTube Thumbnail
The video cover in every available size, up to HD — just paste a link.
Photo → Video with music
A photo plus music becomes a video for Clips, Reels and Shorts — with a live preview.
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
7Matrix 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 & Integrals
The derivative as a formula with an explanation, plus a definite integral with the area shaded under the curve.
Fraction Calculator (with steps)
Add, subtract, multiply and divide fractions — common denominator and reduction explained. Plus GCD and LCM.
Percentage Calculator
All typical percent problems — with the formula and an explanation of every calculation.
Code
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