Compress, resize and convert images, PDFs, documents, audio and video. Hit the exact size a form asks for. No sign-up, no watermark, files deleted after 30 minutes.
Each page opens with the right settings filled in. Everything stays editable.
The most searched conversions, each with its own page and its own defaults.
Most converters give you a box and a button. UltKit starts from the requirement: 20 KB for an exam portal, 10 MB for Discord, 3.5 × 4.5 cm for a visa form. Each page carries the right defaults and the facts behind them.
Compress a photo or PDF to a precise KB or MB figure. The tool searches quality levels and, if needed, downscales until it lands under the limit.
HEIC, WebP, AVIF, camera RAW, PDF, DOCX, EPUB, MP4, MKV, FLAC and more than a hundred others, converted both ways.
Files travel over HTTPS, are processed by software only and are deleted 30 minutes after the job finishes. No account, no history.
Upload straight from the camera roll, adjust the options with your thumb, download the result. The same tools, the same limits, on any screen.
Exam portals and scholarship forms that want a photo under 50 KB and a signature under 20 KB, in exactly the pixels they specify.
Contracts that must be under 2 MB to email, scans that need to become searchable PDFs, decks that need to be PDFs by noon.
Clips that have to fit Discord, Instagram or a client's upload limit, and GIFs that stay sharp without ballooning.
WebP and AVIF for the web, SVG from a logo, fonts in WOFF2, icons in every size, without opening a heavy app.
Passport, visa and ID photos that meet each country's size and background rules, printed four to a sheet.
iPhone photos that will not open on a work laptop, WebP files that a print shop rejects, RAW shots from a camera.
Every tool follows the same three steps, and every step is explained on the page you are using. Nothing is hidden behind a paywall or a sign-up form.
Drag it in, pick it from your device or paste it from the clipboard. The page rejects the wrong type before anything is uploaded.
The headline options are already set for the job on this page. Change any of them, or open Advanced settings for the rest.
Processing happens on our servers so large files behave the same on a phone. Download one file or a ZIP.
Short answers here; the longer versions live on each tool page and in the privacy policy.
Yes. Every tool is free with no account, no watermark and no daily quota beyond the per-file limits shown next to each upload area. The site is supported by advertising.
They are uploaded over HTTPS, processed by software, and deleted automatically 30 minutes after processing finishes. Nobody looks at them and they are never used for anything else.
95 MB per file for every tool, and up to 20 files per batch on most tools. The exact limit is printed on each page.
Always. A page like Compress image to 20 KB simply starts with 20 filled in. Change it to 50, switch the output format or open Advanced settings for everything else.
Only when the job calls for it. Compressing to a small target lowers quality by design and the page tells you how far you can go; format conversions between lossless formats, resizing and PDF operations do not degrade content.
Because the requirements differ. A page for 20 KB and a page for 200 KB carry different defaults, different facts about who asks for that size and different advice on what survives it.
Yes. Every tool works in a mobile browser, including uploading directly from the camera roll on iPhone and Android.
The interface and guidance are available in 40 languages. Where a country has its own photo or document standard, the relevant pages carry that country's numbers.
Open the tool, type the number, drop the file. The page does the rest and tells you what changed.
Specifications, formats and fixes, written and checked by the team.
Make a QR code by encoding a link, Wi-Fi login or contact as a static code, printing it at least 2 × 2 cm with a 4-module white border, and testing it on two phones first.
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