Stellar Online Exchange Repair: What the Browser-Based EDB Tool Actually Offers
A convenient, no-install option for a one-off EDB recovery under 5 GB, with a sensible upload-preview-download workflow. But it's a brand-new, independently unreviewed product with unresolved inconsistencies in its own turnaround claims — good for a quick or non-critical recovery, not yet the safer choice for a production mailbox with no backup.
Corrupt Exchange database (EDB) files usually mean one of two paths: wrestle with native tools like Eseutil, or reach for third-party recovery software. Stellar’s answer has historically been a Windows desktop application — Stellar Repair for Exchange, which NetworkUstad has covered separately. The newer addition is a browser-based version that skips the install entirely, part of Stellar’s wider Online File Repair platform launched in early 2026 alongside browser tools for video, photo, Excel, and PDF repair.
What It Does
Stellar Online Exchange Repair repairs corrupt or inaccessible EDB files directly in the browser and recovers mailbox data — emails, attachments, contacts, calendars, tasks, notes, and journals — while preserving the original mailbox folder hierarchy. No Exchange Server installation is required to run it, which is the main practical difference from working directly on a live server.
The stated workflow:
- Upload the corrupt EDB file through the browser.
- The tool scans and repairs it server-side.
- Preview the recovered mailboxes and folder structure directly in the browser before committing to anything.
- Download the results as a ZIP file containing individual mailboxes in PST format.
- Import the PST files into Live Exchange or Microsoft 365 to restore the mailboxes.
The preview-before-download step is worth calling out specifically — it means you can confirm the repair actually recovered what you needed before spending time on the import step, rather than finding out after the fact.
Free vs. Premium
| Free | Premium | |
|---|---|---|
| File size limit | Up to 500 MB | Up to 5 GB |
| Price | No cost | $99.99 per file |
| Files covered | One EDB file up to 500 MB | One EDB file up to 5 GB |
| Turnaround | Repaired file available within 24 hours | Repaired file available within 48 hours |
One inconsistency worth flagging before this goes anywhere near a published page: the turnaround times as given have the paid tier taking longer (48 hours) than the free tier (24 hours). That’s backwards from how tiered service pricing normally works, and it reads more like a typo in the source material than an intentional design choice. Worth confirming directly with Stellar before repeating this figure publicly — publishing an error like this as fact would be exactly the kind of unverified vendor claim this site’s audit process exists to catch.
The 500 MB free / 5 GB premium split mirrors the pattern Stellar uses across its other browser-based repair tools (their PST and video repair tools follow a similar structure), so the general shape of the offer is consistent with the rest of their online platform — it’s specifically the turnaround-time figures that need a second look.
How the Browser Version Compares to the Desktop Version
| Online (Browser) | Desktop (Stellar Repair for Exchange) | |
|---|---|---|
| Installation | None — runs in browser | Windows application install required |
| Free tier file size | Up to 500 MB | Free preview/scan available; repair requires purchase |
| Max file size | 5 GB (premium) | No stated file size limit (paid, perpetual license) |
| Pricing model | Per-file ($99.99 for premium tier) | Perpetual license, reported in the $399–$999 range depending on edition |
| Best fit | A single, moderate-sized EDB, occasional use, no install wanted | Ongoing admin use, larger or more frequent recoveries, enterprise environments |
For a large enterprise EDB — tens of gigabytes, which is common for production Exchange databases — the 5 GB premium ceiling on the browser tool is a real limitation. That scenario is squarely the desktop tool’s territory instead.
Where This Fits
The browser tool’s appeal is speed of access, not raw capacity: no download, no install, usable from any device including one you don’t have admin rights on. That’s a genuinely different use case from the desktop tool — a small business with one dismounted mailbox database well under 5 GB is the realistic target, not an enterprise Exchange administrator managing multi-database production environments day to day.
Third-Party Review Scores — Desktop Product Only
Important: every score below is for the desktop Stellar Repair for Exchange, not the browser-based tool this piece covers. I found zero independent reviews or ratings anywhere for the browser tool — it’s too new (the wider Online File Repair platform launched around March 2026) to have accumulated any public feedback yet. These numbers are included for context on Stellar as a vendor, not as a stand-in rating for the product actually being described here.
| Source | Rating | Notes |
|---|---|---|
| Trustpilot | 4.9/5 (273 reviews) | As cited by a third-party review site — not independently pulled from Trustpilot directly |
| G2 (Stellar Data Recovery Inc., company-wide) | 4.3/5 (109 reviews) | Aggregate across all Stellar products, not specific to Exchange repair |
| Stellar’s own MVP testimonials page | 4.8/5 | Self-published by Stellar — not an independent source |
+Pros
- No software installation — accessible from any browser/device
- No Exchange Server required to perform the repair
- Preserves mailbox hierarchy, so recovered structure should match the original
- Preview before download lets you confirm results before committing further steps
- Recovers a broad range of item types, not just email (contacts, calendar, tasks, notes, journals)
- Free tier available at no cost for files up to 500 MB
- Output format (PST) is broadly compatible with standard Exchange/365 import workflows
−Cons
- File size hard-capped even on the paid tier — 5 GB maximum, which publisher's own data shows is well below what a production Exchange database commonly reaches
- Premium tier is priced per file ($99.99), not a subscription or license — repeat use adds up compared to the desktop tool's one-time purchase model
- Free tier limited to one file up to 500 MB — anything larger requires payment
- Publisher's own stated turnaround times show premium (48 hours) as slower than free (24 hours) — an inconsistency in the publisher's own data that we were unable to resolve or explain
- No stated guarantee of full data recovery — publisher's material doesn't specify a completeness or success-rate figure for either tier
- No independent verification available yet, since the product is new — everything above is the publisher's own claim, not confirmed third-party testing