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FormatMath VS ConvertifyApp.net

Compare FormatMath VS ConvertifyApp.net and see what are their differences

FormatMath

Convert HEIC, WebP, PNG, JPG, RAW, PSD, TIFF and PDF files right in your browser. Merge, split and compress PDFs. Free, no upload, no sign-up.

Rating
0 reviews
Promote on VibeVoted
Support its launch · 0 supporters
Alternatives Is it good?
ConvertifyApp.net

Free online image and PDF converter — HEIC, WebP, AVIF, PNG, JPG and 20+ formats

Rating
0 reviews
Pricing
Free
Promote on VibeVoted
Alternatives Is it good?
PDF my URL
PDFmyURL turns any webpage or even complete website into PDF. Use our rest API in PHP, .NET, Ruby, Perl or any other programming language. Or convert webpages or even full websites directly in the browser! sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, ConvertifyApp.net seems to be more popular. It has been mentioned 12 times since March 2021.

social mentions
0 vs 12
File Management popularity
100% vs 0%
alternatives listed
6 vs 22

Base details

Website, pricing, platforms and company facts side by side.

FormatMath
ConvertifyApp.net
Website formatmath.com convertifyapp.net
Pricing —
Free
Company Startup from Ukraine · 2026 Startup from Ukraine · 1 - 9 employees
Listed in
File Converter File Management Developer Tools PDF Tools AI Image Generator Image Marketplace AI +4
Photos & Graphics Image Converter Video Converter File Sharing +1

About FormatMath and ConvertifyApp.net

In their own words, as submitted to SaaSHub.

FormatMath
ConvertifyApp.net

👋 I'm Vitaliy, and I built formatmath: a free file converter with no limits. Here's the idea behind it. Almost every online converter works the same way: you upload your photo or document to their server, they convert it there, and you download the result. That means your private files...

Read more about FormatMath

Free online image and PDF converter. Supports HEIC, AVIF, WebP, PNG, JPG, TIFF, BMP, GIF and 20+ formats. Batch up to 10 files, no signup, in-memory processing, powered by Rust and libvips.

Read more about ConvertifyApp.net

Features and specs

What each product offers, as listed by its team.

FormatMath 0 features
ConvertifyApp.net 5 features

No features have been listed yet.

  • No installation required
    I could not access or verify this site. Web-based converters like ConvertifyApp.net usually run in the browser, so users can convert files without installing software, on any device with internet access.
  • Convenience for quick tasks
    Online conversion tools are generally suited to fast, one-off conversions. Users upload a file, pick an output format, and download the result in a few steps. Check whether this site follows that pattern.
  • Cross-platform accessibility
    Because it is a website, it should work across Windows, macOS, Linux, and mobile browsers, with no OS-specific compatibility concerns. Confirm this by testing the site.
  • Potentially free or low-cost entry
    Many online converters offer a free tier for basic use. Check the site's pricing page to see whether this applies and what the free limits are.
  • Possible support for multiple formats
    Converter sites often cover many file types, such as documents, images, audio, and video, in one place. Verify the actual list of supported formats on the site.

Possible disadvantages

  • Unverified reputation and trustworthiness
    I could not verify the site's reputation, ownership, or reviews. Before uploading anything, check independent reviews, the domain's age, and trust ratings from sources such as Trustpilot or Scamadviser.
  • Privacy and data security risks
    Uploading files to any third-party server exposes them to storage and handling risks. Review the privacy policy for retention periods, deletion practices, and sharing. Avoid uploading sensitive or confidential files.
  • Likely file size and usage limits
    Free online converters commonly cap file size, daily conversions, or speed, and may require a paid plan to remove the limits. Check the site's actual limits.
  • Internet dependence and speed
    A web converter needs a stable connection, and large uploads and downloads can be slow. It will not work offline, unlike desktop software.
  • Possible ads or quality limitations
    Free converter sites often show ads or pop-ups, and some give limited control over output quality or settings compared with dedicated desktop tools. Be careful with ads and download prompts, and scan any downloaded files.

Analysis

An editorial look at what each product does well and who it suits.

FormatMath
ConvertifyApp.net

No analysis of FormatMath yet.

Overall verdict

  • I don't have verified, up-to-date information about ConvertifyApp.net specifically, so I can't confirm its legitimacy, safety, or quality with confidence. Before using it, I'd recommend independently verifying its reputation, security, and user reviews.

Why this product is good

  • Lack of independent, verifiable information about this specific domain makes it hard to confirm quality or trustworthiness.
  • Unfamiliar or newer conversion/utility apps can vary widely in reliability, privacy practices, and safety.
  • Without seeing user reviews, business registration details, or security audits, no strong endorsement can be made.
  • Generic 'converter' style apps/websites are sometimes associated with ad-heavy experiences or data collection, so caution is warranted.

Recommended for

  • Users who first check independent reviews, domain age, and security reports (e.g., via WHOIS, Trustpilot, Reddit) before trusting the site.
  • People needing a simple file/format converter who are willing to test it cautiously with non-sensitive files.
  • Not recommended for those needing to convert sensitive, confidential, or personal documents without first verifying the site's privacy policy and security measures.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
FormatMath
ConvertifyApp.net
100% 100%
File Management
0% 0%
0% 0%
File Converter
100% 100%
64% 64%
Image Marketplace
36% 36%
0% 0%
Image Converter
100% 100%

Questions & Answers

As answered by people managing FormatMath and ConvertifyApp.net.

Who are some of the biggest customers of your product?

FormatMath's answer

Individual users (no accounts required, so we don’t track customers)

ConvertifyApp.net's answer:

  • Individual users converting iPhone HEIC photos
  • Web developers optimizing images for web

Which are the primary technologies used for building your product?

FormatMath's answer

TypeScript and Astro (static site) Cloudflare Workers and D1 (hosting, blog and anonymous usage stats) WebAssembly codecs (libheif for HEIC, jSquash for JPEG XL and WebP) pdf.js and pdf-lib for PDF rendering and editing Canvas and Web Workers for in-browser image processing fflate (ZIP), UTIF (TIFF), ag-psd (Photoshop files), exifr (metadata), yaml

ConvertifyApp.net's answer:

  • Rust + Axum (backend API)
  • libvips + libheif (image processing)
  • React + TypeScript (frontend)
  • PostgreSQL (analytics)
  • Caddy (reverse proxy)
  • VPS on Ubuntu 24.04

What's the story behind your product?

FormatMath's answer

I kept needing to convert iPhone photos and PDFs, and every online converter wanted me to upload private files to an unknown server, then limited me by file size or number of conversions. Modern browsers can decode and encode most formats themselves, so I built FormatMath to do all the work on the user’s device instead. It started with HEIC to JPG and grew into image, RAW, PDF, compression, photo-privacy and developer tools, in English and Ukrainian. I also run fee-math.com, a set of free fee calculators for online sellers built on the same no-upload principle.

ConvertifyApp.net's answer:

Built out of frustration with existing converters that require signup or add watermarks. Wanted a fast, private, no-nonsense tool. Chose Rust + libvips for performance — the hardest part was getting HEIC support working by building libheif 1.21.2 from source.

How would you describe the primary audience of your product?

FormatMath's answer

iPhone users who need HEIC photos as JPG for websites, forms and Windows PCs Photographers who need quick JPG previews from camera RAW files Office workers and students who merge, split, rotate or compress PDFs Privacy-conscious people who don’t want to upload personal files to a server Developers who need quick JSON, YAML, CSV, Base64, UUID or regex tools

ConvertifyApp.net's answer:

iPhone users who need to convert HEIC photos, web developers working with WebP and AVIF formats, and anyone who needs fast batch image conversion without installing softwar

Why should a person choose your product over its competitors?

FormatMath's answer

Privacy and no limits. Popular converters like CloudConvert, Convertio, FreeConvert or Zamzar upload your files to their servers and limit free use by file size, number of conversions or waiting time. FormatMath converts locally, so private photos, scans and documents stay on your device, and you can batch-convert hundreds of files and download them as one ZIP for free. It also covers formats many converters skip, such as camera RAW (CR2, CR3, NEF, ARW, DNG and more), PSD, JPEG XL and CBZ.

ConvertifyApp.net's answer:

Convertify is completely free with no signup required and no watermarks. Most converters either require registration, add watermarks, or are slow. Convertify is built with Rust + libvips for maximum speed, supports 20+ formats including HEIC, and automatically deletes files after 6 hours for privacy.

What makes your product unique?

FormatMath's answer

Every tool runs entirely in your browser. When you convert a file, it’s read and processed on your own device and saved straight back to it, so it’s never uploaded and our server never sees it. Because there’s no server-side processing to pay for, there are also no file size caps, no daily limits, no watermarks and no sign-up. It works offline once a page has loaded.

ConvertifyApp.net's answer:

No signup, no watermarks, no limits on format combinations. Built with Rust + libvips — one of the fastest image processing libraries available. Supports HEIC conversion which most browser-based tools struggle with. Files are automatically deleted after 6 hours, so nothing is stored permanently. Batch convert up to 10 images at once with quality and resize controls.

User comments

Share your experience with using FormatMath and ConvertifyApp.net. For example, how are they different and which one is better?

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

FormatMath 0 mentions
ConvertifyApp.net 12 mentions

Tracking FormatMath since Nov 2026.

  • The frontend bug that hid 170 custom SEO titles for 3 months (and 3 weeks of shipping after finding it)
    If you found this useful, the Convertify tool pages are the ones with the newly-visible custom titles. - Source: dev.to / 2 months ago
  • How I recorded my first product demo in 54 seconds (OBS, ffmpeg, openai.fm)
    Convertify is at convertifyapp.net. Free, no signup, no watermarks, batch up to 20 files. - Source: dev.to / 3 months ago
  • I Benchmarked 17 Image Conversions on My Production Server. Some Results Were Not What I Expected.
    I run Convertify, a free image converter built on Rust and libvips. Last week I decided to stop guessing about format performance and actually measure it. I took 50 real images (26 PNGs, 24 iPhone HEIC photos), ran 17 conversions through... - Source: dev.to / 5 months ago

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Alternatives to FormatMath and ConvertifyApp.net

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