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Aback Tools is a free, browser-based collection of 2356 file, data, and security utilities.
Grounded in available product and source data
Installing a separate app for every one-off file conversion, hash check, or JWT decode adds up fast — Aback Tools offers free browser-based online utilities instead, putting 2356 of them behind a single search box with no installation or signup.
Coverage spans well beyond simple converters: Data alone accounts for 572 tools, including format conversions like JSON to YAML and a Large Excel to JSON/CSV converter built to handle files with 50,000+ rows, while Crypto & Security covers 18 tools including an RSA/ECDSA Key Generator, a JWT Builder, and a JWT Debugger & Signature Verifier for checking HS/RS/ES-signed tokens. Audio & Video adds 59 tools such as an Audio Normalizer that targets specific LUFS loudness levels for Spotify, YouTube, EBU R128, or podcast delivery, and Compress brings 135 tools including a ZIP File Extractor and a TAR.GZ Extractor for browsing and pulling files out of an archive without separate software.
The site states several tools process locally in the browser rather than uploading files to a server — relevant for anything touching sensitive data, like the AES File Encryptor/Decryptor or the Cryptographically Secure Password Generator, both of which rely on the browser's own Web Crypto API rather than a remote service.
The site is supported through affiliate partnerships rather than direct charges for tool access, and publishes llms.txt, llms-full.txt, and ai.txt files specifically to support AI crawler access to its tool catalog. The page reviewed does not specify a file-size ceiling across every individual tool, worth checking a specific tool's own page before running an unusually large file through it.
No — the site states no installation or signup is required to use any of the 2356 listed tools.
Data is the largest named category at 572 tools, though the page reviewed does not break down usage by category, so which section actually gets the most traffic isn't stated.
Large files are specifically supported for some tools — the Large Excel to JSON/CSV converter is described as handling files with 50,000+ rows, though the page reviewed does not specify a general size limit across every other tool.
The site states it's supported through affiliate partnerships rather than charging directly for tool access, with users able to support it further through those affiliate links if they choose.
