OnlineAITool
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Free tools for images, PDFs, AI and everyday tasks

Image and PDF tools, AI and text utilities, exam and visa photo sizing, calculators, career and developer tools — 306 in total. Many hit an exact specification: compress an image to 20 KB, shrink a PDF to 200 KB, resize a signature to 140 × 60 pixels. Every one runs inside your browser, so your files never leave your device.

Recently added

16 new

The newest tools on the site, built for searches that had no good browser-only answer.

Add Name and Date to an Exam PhotoPrint your name and the date of the photograph onto an exam photo, in your browser. Keeps …Exam Photo and Signature Resizer — Any SizeResize a photo or signature to the exact pixels and KB range your exam form asks for. Ente…Handwritten Declaration ResizerResize a scanned handwritten declaration to 800 × 400 pixels and 50–100 KB, the specificat…AI Text CleanerStrip the em dashes, curly quotes and invisible characters that AI writing tools leave beh…Invisible Character RemoverFind and remove zero-width spaces, byte order marks and other characters that take up no s…Cron Expression ExplainerRead a cron expression in plain English and see exactly when it will next run. Free, insta…JSON to YAMLConvert JSON into YAML, with the quoting rules that stop YAML reading your values as the w…Convert SVG to PNGConvert SVG images to PNG in your browser. No upload, no sign-up, no watermark.…Convert SVG to JPGConvert SVG images to JPG in your browser. No upload, no sign-up, no watermark.…Convert AVIF to JPGConvert AVIF images to JPG in your browser. No upload, no sign-up, no watermark.…Convert AVIF to PNGConvert AVIF images to PNG in your browser. No upload, no sign-up, no watermark.…Convert WebP to PNGConvert WebP images to PNG in your browser. No upload, no sign-up, no watermark.…Convert BMP to PNGConvert BMP images to PNG in your browser. No upload, no sign-up, no watermark.…Convert GIF to PNGConvert GIF images to PNG in your browser. No upload, no sign-up, no watermark.…Crop Image to a SquareCrop any photograph to a perfect square without changing its resolution or distorting it. …Crop Image to 9:16 VerticalCrop a photograph to 9:16 vertical, the full-screen ratio used by Stories, Reels and Short…

Image Tools

57 tools

Compress and resize images to an exact file size or pixel specification.

See all 57 image tools →

PDF Tools

54 tools

Compress PDFs to a target size, and merge, split, rotate or reorder pages.

See all 54 pdf tools →

Exam & Forms

54 tools

Photo and signature presets for exam and government application forms.

See all 54 exam & forms →

Platform Specs

30 tools

One-click presets for visa, marketplace and social media upload requirements.

See all 30 platform specs →

Calculators

50 tools

Finance, tax, health and everyday calculators that show their working.

See all 50 calculators →

Text Tools

14 tools

Count, convert and clean up text, live as you type.

See all 14 text tools →

Developer Tools

13 tools

JSON, Base64 and URL utilities that run locally — your data never leaves the page.

See all 13 developer tools →

SEO & Generators

5 tools

Meta tags, robots.txt, sitemaps, QR codes and secure passwords.

See all 5 seo & generators →

Career Tools

16 tools

Resume, cover letter and job description tools — including an ATS checker that needs no AI.

See all 16 career tools →

Writing Tools

4 tools

Summarise, rephrase, rewrite and check grammar.

See all 4 writing tools →

AI & Metadata

7 tools

Read what is actually inside an image file — AI generation data, camera EXIF, GPS.

See all 7 ai & metadata →

YouTube Tools

2 tools

Thumbnail URLs and previews for any YouTube video.

See all 2 youtube tools →

Why these tools are different

They target a specification, not a vague "smaller"

Most compressors give you a quality slider and leave you guessing. These start from the requirement — 20 KB, 200 × 230 pixels, under 1 MB — and search for the highest quality that still fits. You get a file that passes the form, with as much detail as the limit allows.

Nothing is uploaded

Processing runs on your own device. There is no server handling your files, which means no upload wait, no storage, no privacy question, and no usage cap. You can confirm it: open your browser's Network tab and watch that nothing is sent.

Specifications are dated and sourced

Exam boards and governments revise upload rules regularly, and most tool sites copy stale numbers from each other. Every specification page here shows where the figure came from and when we last checked it. Where we could not verify something, the page says so rather than presenting a guess as fact.

Honest about limits

PDF compression to a hard size target requires rasterising the document, which stops the text being selectable. We say that above the tool rather than hiding it, because for a résumé being read by an applicant tracking system it genuinely matters.

Frequently asked questions

What does this site do?

It is a collection of 306 free online tools across 12 categories: compressing images and PDFs to an exact file size, resizing photos and signatures to exam and visa specifications, converting between file formats, and a set of everyday text, developer and calculation utilities. The largest groups are 54 PDF tools, 54 exam and form presets, 50 calculators and 57 image tools.

Are these tools free?

Yes, and without the usual catches. There is no account to create, no free-trial countdown, no watermark on the output, no daily limit on how many files you process, and no paid tier that unlocks the useful settings. The site is funded by advertising.

Do you upload my files?

No. The tools run inside your browser using the same file and canvas APIs any web page has, so your image or PDF is never transmitted anywhere. You can check this yourself: open your browser’s developer tools, switch to the Network tab, and use any tool — you will see the page load and then nothing. Disconnect from the internet after the page has loaded and the tools still work.

Is there any exception to that?

Yes, and it is worth being clear about. The 12 AI writing and document tools need a language model, which cannot run in a browser at usable speed, so those pages send your text to a server and get text back. Even there the file itself stays on your device: a PDF’s text is extracted locally and only the extracted text travels. Those pages say so on the page, and they are the only ones with a daily limit.

Do I need to install anything?

No. There is nothing to download and no extension to add. Everything runs in the browser you already have, on Windows, macOS, Linux, Android or iOS.

Is there a file size limit?

There is no limit imposed by us, because there is no server quota to protect. The practical ceiling is your own device’s memory: a phone will struggle with a very large PDF where a laptop will not. If a file is too big you will see the tool slow down rather than be told you have exceeded a plan.

Can I use these tools on a phone?

Yes. The tools work on mobile browsers, and the image tools accept photos straight from your camera roll. Large files are slower on a phone than on a computer because the work happens on the device.

How accurate are the file size targets?

The compression tools search for the largest quality setting that still fits under your target, so the result lands under the limit rather than near it. Many tool pages publish a measured run against a fixed reference file, showing the exact input size, every attempt made, and the final output — so you can see what the tool actually did rather than taking a claim on trust.

Guides

Why Your Exam Form Photo Keeps Getting RejectedEight reasons Indian recruitment portals reject a photo or signature, and how to fix each … Image Size Requirements for Every Major PlatformThe exact pixel dimensions and file size limits for Amazon, Etsy, eBay, Shopify, YouTube, … How to Compress an Image to an Exact File SizeWhy most compressors overshoot or undershoot your target, and the binary search method tha… How to Compress a PDF Without Ruining ItWhy PDF compression is a genuine trade-off, what it costs you, and when you should fix the… Résumé File Size: What an ATS Actually AcceptsThe real limits, why an oversized résumé fails silently, and the fix that does not break t… Photo and Signature Sizes for Every Major Indian ExamA single reference table of photo and signature requirements across SSC, IBPS, SBI, NTA an… How to Compress an Image to Any Size: The Complete GuideEvery size target from 10 KB to 2 MB, which one you actually need, and how to reach it wit… Every PDF Tool You Need, and When to Use EachWhich PDF operations are lossless, which permanently change your document, and how to pick… Visa and Passport Photo Sizes: A Country-by-Country GuideExact photo specifications for the US, UK, Schengen, Canada, Australia, UAE, India, Japan,… Free SEO Tools: Meta Tags, Robots.txt, Sitemaps and QR CodesWhat each file actually does, the mistakes that cost traffic, and tools that generate them… Text and Developer Tools That Never Upload Your DataWhy it matters that JSON formatters and text tools run locally, and what each of these act… Loan, Mortgage and Investment Calculators ExplainedWhat EMI actually means, why early payments are almost all interest, and which figure to c…