Free Online Converter Tools
Convert images, text, units, colors, PDFs, audio, and video instantly in your browser. No sign-up, no server uploads — everything stays on your device.
Every tool on Tooloco runs entirely client-side using modern browser APIs — the Canvas API for images, WebAssembly for audio and video, and pdf-lib for PDF files. That means your files are never transmitted anywhere. Whether you are a developer, designer, student, or just someone who needs a quick conversion, Tooloco has a tool ready for you — no installation required, no account needed, no cost.
All Converter Categories
Image Converters
Convert images between formats instantly in your browser. No uploads, no servers — 100% private.
Text Converters
Transform and convert text instantly. Case conversion, encoding, formatting and more.
Unit Converters
Convert between units of measurement. Length, weight, temperature, speed and more.
Color Converters
Convert colors between HEX, RGB, HSL and more. For designers and developers.
Number Base Converters
Convert numbers between binary, decimal, hexadecimal and octal bases instantly.
Data Size Converters
Convert between bytes, kilobytes, megabytes, gigabytes and terabytes instantly.
Audio Converters
Convert audio files between formats instantly. MP3, WAV, OGG, FLAC, M4A and more. No uploads required.
Video Converters
Convert video files between formats in your browser. MP4, WebM, MOV, AVI and more. No uploads required.
Developer Tools
Essential tools for developers. Format JSON, encode/decode Base64 and URLs, generate hashes, UUIDs, decode JWTs and more.
PDF Tools
Merge, split, compress, rotate and convert PDF files instantly in your browser. No uploads to servers — 100% private.
Meme Maker
Create memes, demotivational posters and captioned images entirely in your browser. No uploads, no accounts.
Most Popular Tools
JPG to PNG Converter
Convert JPG images to PNG format online for free. Keeps transparency support. No quality loss.
Word & Character Counter
Count words, characters, sentences, paragraphs and estimate reading time instantly.
Merge Video and Audio
Add or replace audio in a video file online. Merge any video with any audio track. No upload needed.
JSON Formatter & Validator
Format, prettify and validate JSON online. Instantly beautify minified JSON with syntax highlighting.
CSV to JSON Converter
Convert CSV data to JSON format online. Paste your CSV and get formatted JSON instantly.
Merge PDF
Combine multiple PDF files into one. Drag to reorder pages before merging. Free and private.
PDF to JPG
Convert each page of a PDF to a JPG image online. Download all pages as a ZIP file.
Compress PDF
Reduce PDF file size online for free. Optimise PDFs for email and web sharing.
Meme Generator
Add top and bottom text to any image in classic Impact font style. Download as PNG or JPG.