ImageOptim
TinyPNG
Squoosh
Caesium Image Compressor
iLoveIMG
Compressor.io
XnConvert
PNGGauntlet
Sunasty
iLovePDF
TinyPNG
Smallpdf
ToolKnit
CloudConvert
Convertio
iLoveIMG
Sunasty is a suite of 130+ free utilities for everyday file tasks: PDF (merge, split, compress, sign, unlock), images (compress, resize, crop, redact, HEIC to JPG), video and audio (compress, convert, trim, extract audio, screen recording), plus developer, date and calculator tools.
The difference is structural: every tool runs entirely in your browser using WebAssembly (FFmpeg, modern image codecs, qpdf). Files are never uploaded to a server, which you can verify in your browser's network tab. Tools keep working offline once loaded. No account, no file size tiers, no daily quotas. Available in 28 languages.
ImageOptim SunastyNo Sunasty videos yet. You could help us improve this page by suggesting one.
Sunasty's answer:
The site is statically generated with Astro and TypeScript, with lightweight Preact islands for interactivity. The heavy lifting runs client-side in Web Workers through WebAssembly builds of proven engines: FFmpeg for video and audio, qpdf and pdf-lib for PDF, the Squoosh codecs (MozJPEG, OxiPNG, WebP, AVIF) for images, and Tesseract for OCR. There is no application backend at all: the server only delivers static files.
Sunasty's answer:
The privacy is structural, not a policy promise: every tool runs entirely in your browser through WebAssembly, so your files never leave your device. You can verify it yourself by opening the DevTools network tab while using any tool: no request carries your file, and everything keeps working offline once the page has loaded. Combined with 140+ tools, no account, no quotas and 28 languages, that architecture is the product.
Sunasty's answer:
Most popular alternatives (iLovePDF, Smallpdf, CloudConvert, TinyPNG) process files on their servers and monetize through limits: daily quotas, file size caps, subscriptions. With Sunasty there is no upload wait, no copy of your document on someone else's machine, and no counter to unlock, because the work happens on your own hardware. And when a competitor genuinely is the better choice (for example server-side conversion of PDF to editable Word, which a browser cannot do faithfully), our comparison pages say so.
Sunasty's answer:
Anyone who handles files day to day: people compressing a PDF to fit an application portal or an email cap, gamers and creators trimming and shrinking clips for Discord, anyone blurring a name on a screenshot before sharing it, developers formatting JSON or testing regexes, and privacy-conscious users working with contracts, IDs or anything confidential that should never transit through a third-party server.
Sunasty's answer:
Sunasty is built by a solo developer in France. The trigger was a familiar frustration: every "free" online tool for a 30-second file task wanted an upload to an unknown server, an account, or a subscription to lift an artificial limit. Modern browsers can do that work themselves thanks to WebAssembly, so Sunasty was built the other way around: the file never leaves your device, by architecture. The amber cat in the logo is the developer's actual cat.
Sunasty's answer:
Sunasty is a free consumer tool, so there are no enterprise contracts to name, and since there are no accounts and files never reach us, we genuinely cannot tell who uses it. It is used by individuals worldwide in 28 languages, which is exactly how a privacy tool should work.
Based on our record, ImageOptim seems to be a lot more popular than Sunasty. While we know about 54 links to ImageOptim, we've tracked only 1 mention of Sunasty. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Compress Images: Use tools like TinyPNG or ImageOptim to reduce image sizes without sacrificing quality. - Source: dev.to / almost 2 years ago
Compress Images: Reduce file size while maintaining quality using image compression tools like TinyPNG or ImageOptim. Also, you can use Figma plugin: ExportX. - Source: dev.to / about 2 years ago
Compressing images: This technique reduces image size without compromising quality. You can achieve this using various image compression tools like TinyPNG or ImageOptim. These tools are specifically designed to manage multiple image formats and compression methods. They help reduce image files, resulting in less data transfer from the server to the user's device. It is advisable to compress images before... - Source: dev.to / over 2 years ago
ImageOptim: ImageOptim is a free and open-source tool that can be used to compress JPEG, PNG, and GIF images. - Source: dev.to / over 2 years ago
Currently installed apps: Alfred for searching applications/files and launching websites quickly I Stat menus to monitor my hardware Geo Gebra Classic 6 for school Rectangle for better window management Obsidian for note taking Resolve for video editing and all utilities that come with it Bitwarden as my go-to password manager Microsoft Word, Excel PowerPoint and Teams for school Dropover for moving or... Source: almost 3 years ago
Have you checked out https://sunasty.com. - Source: Hacker News / about 2 months ago
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
iLovePDF - Premium online PDF tool set
Squoosh - Compress and compare images with different codecs, right in your browser
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
Smallpdf - PDF document management and conversion suite
iLoveIMG - iLoveIMG is one of most powerful solution that comes with all the major tool you cloud want to edit images in bulk.