Free · No sign-up
Free online tools for files, text and everyday calculations
Optimize images, convert files and get answers fast. Most tools work right in your browser, so your files never leave your device.
- 41 free tools
- 14 categories
- 5 languages
- 100% in your browser
Popular tools
All 41 tools-
Image Compressor
Compress JPG, PNG and WebP images in your browser. Choose the quality, shrink dimensions and download smaller files – no upload needed.
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New
Image to Text Converter (OCR)
Extract text from images, screenshots and scans with OCR. Supports English, German, Spanish and Persian. Free, private, runs in your browser.
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Merge PDF
Combine several PDF files into one document in the order you choose. Free, no upload — the PDFs are merged in your browser.
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New
Text to Image Converter
Turn any text into an image: quotes, social media posts, story slides and banners. Choose size, font and colors, then save as PNG, JPG or WebP.
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QR Code Generator
Create QR codes for links, text, Wi-Fi and email. Choose colors and error correction, and download as PNG or SVG. Free, no sign-up, no tracking.
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Word Counter
Count words, characters (with and without spaces), sentences and paragraphs instantly, plus reading and speaking time.
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Percentage Calculator
Calculate percentages instantly: X% of Y, what percent X is of Y, percentage change, and adding or subtracting a percentage.
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New
Date Converter (Persian, Hijri, Gregorian)
Convert dates between the Persian (Solar Hijri/Shamsi), Islamic (Lunar Hijri) and Gregorian calendars, with weekday and leap years.
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Browse by category
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3 tools
PDF Tools
Merge PDF files, split or extract pages and turn images into a PDF.
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6 tools
Image Tools
Compress, resize, crop and rotate images without uploading them.
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5 tools
Text Tools
Count words and characters, change case and clean up text.
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5 tools
Developer Tools
Format JSON, encode Base64 and URLs, generate UUIDs.
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5 tools
SEO Tools
Check titles, meta descriptions and other on-page basics.
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2 tools
File Conversion
Convert between common document and image formats.
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5 tools
Calculators
Percentages, discounts, tips, BMI, averages and other everyday math.
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1 tool
QR Code Tools
Create QR codes for links, text, Wi-Fi and more.
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1 tool
Productivity Tools
Small helpers for planning, timing and focused work.
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1 tool
AI Tools
Build clear, structured prompts for ChatGPT, Claude and Gemini.
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1 tool
Color Tools
Convert HEX, RGB, HSL and CMYK colors and check contrast.
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4 tools
Date & Time Tools
Exact age, days between dates, time zones and Persian or Hijri dates.
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1 tool
Unit Converters
Length, weight, temperature, volume and more.
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1 tool
Finance Calculators
Loan and mortgage payments, interest and amortization.
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All free tools
Guides and how-tos
Step-by-step explanations of the everyday tasks behind our tools.
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How to Reduce Photo File Size: What Really Works for 100 kB, 200 kB and 500 kB
Lowering the quality alone barely helped our phone photos, and at higher settings they even got bigger. We measured which combination of size and quality fits common upload limits.
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How to Count Words and Characters: Why Counters Disagree, SMS Limits and Reading Time
The same sentence can have 8, 10 or 12 words, depending on who counts. We tested how browsers split words, counted our own guides in four languages and worked out when an SMS shrinks from 160 to 70 characters.
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How to Check Color Contrast: WCAG 2.2 Ratios, HEX, RGB and HSL Explained
Why white text on a bright blue button can fail, why HSL lightness is misleading and which gray is the lightest you can use on white. We calculated the WCAG 2.2 contrast ratios for common colors.
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Why omid57?
Your files stay with you
Most tools run entirely in your browser. Nothing is uploaded, stored or analyzed on our servers.
Free and instant
No account, no watermarks, no waiting. Open a tool and get your result in seconds.
Made for your region
Five languages with local formats for numbers, dates and currencies, so results look the way you expect.
How it works
Pick a tool
Choose a category or jump straight to a tool from the list above. No account, no download, no browser extension.
Add your file or data
Drop in an image, paste text or type a few numbers. Everything is processed right in your browser, on your own device.
Get your result
Download the file or copy the result in seconds. Close the tab and nothing is left behind on any server.
Free online tools that respect your privacy
omid57 is a growing collection of free online tools for the small jobs that come up every day: making a photo small enough for an email, turning PNG screenshots into JPG, combining pictures into one PDF, counting the words in an essay, tidying up JSON, creating a QR code for a flyer or working out a percentage, an age or the monthly payment of a loan. New: read the text from a photo or screenshot, turn a quote into an image for social media and convert dates between the Persian, Islamic and Gregorian calendars.
Almost every tool runs entirely in your web browser using standard technologies such as the Canvas API and JavaScript. Your images, documents and text are not uploaded to a server, so they cannot be stored, shared or used to train anything. That also makes the tools fast: there is no upload queue and no waiting for a server, and most results appear instantly — even on a phone.
Each tool page explains step by step how to use it, what the settings mean and what to watch out for, and answers the most common questions. The site is available in English, German, Spanish and Persian, with numbers, dates and currencies formatted for your region. New tools are added regularly — if something is missing, send us a suggestion via the contact page.
Frequently asked questions
Are the tools really free?
Yes. All tools are free to use without limits, without an account and without watermarks on your files. We keep it that way with unobtrusive advertising.
Are my files uploaded to a server?
No. Image, PDF, text and developer tools process your data locally in your browser. Nothing you add is sent to us or stored anywhere.
Do I need to install anything or create an account?
No. The tools work in any up-to-date browser such as Chrome, Firefox, Safari or Edge, on Windows, macOS, Linux, Android and iOS.
Do the tools work on my phone?
Yes. Every page is built for small screens. On a phone you can pick photos straight from your gallery and share results with one tap.
How accurate are the calculators?
The calculators use standard formulas and show how the result is calculated. They are meant for quick estimates; for financial, legal or medical decisions please ask a professional.
Can I suggest a new tool?
Yes, please do. Use the contact page to tell us which tool you are missing. Many of our tools started as a visitor’s idea.
More from our team
More free websites we run.
- FinanzTool – free financial calculators Loans, savings, investing, inflation, salary and live exchange rates – clear calculators in five languages. finanztool.info Visit site
- Omid57.info – live news The latest headlines from major news outlets, gathered on one page – in English, German, Spanish and Persian. omid57.info Visit site
- Omid57.net – society & human rights A personal blog with commentary on social and political issues and human rights. omid57.net Visit site
- MultiLink2026 – the best links Share, vote on and discuss links: the best ones rise to the top through the community's votes. multilink2026.com Visit site